Explore Our Planet » CO2 Level / Monthly - it’s simply Global Warming and Climate Change

CO2 Level / Monthly

Since 1958 scientists at the Mauna Loa Observatory, Hawaii, measure the CO2 concentration. in the atmosphere.

Surprisingly the level of CO2 was and is constantly rising over years with a variance caused by the seasons.

You’ll find more land on the northern hemisphere and therefore during spring more CO2 is captured.

Later on by analyzing the isotopes it was shown that the source of the rising CO2 level is anthropogenic.

Data Credit goes to Dr. Pieter Tans, NOAA/Earth System Research Laboratory. Visit the NOAA site for more interesting details. The following table is updated every Monday.

Units are ppm (parts per million) .

Year	Month	MLO - Average	MLO - Trend	Global - Average	Global - Trend
2010	Feb	389.91	389.02
2010	Jan	388.65	388.36
2009	Dec	387.27	388.08	388.01	387.46
2009	Nov	385.99	388.08	386.86	387.18
2009	Oct	384.38	387.76	385.14	386.73
2009	Sep	384.77	388.01	383.64	386.39
2009	Aug	385.91	387.64	383.56	386.20
2009	Jul	387.74	387.24	384.88	386.07
2009	Jun	389.43	387.11	386.64	386.06
2009	May	390.18	387.09	387.65	386.04
2009	Apr	389.46	386.78	387.68	385.87
2009	Mar	388.77	387.27	387.38	385.79
2009	Feb	387.41	386.53	387.20	385.85
2009	Jan	386.92	386.64	386.77	385.78
2008	Dec	385.54	386.35	386.01	385.47
2008	Nov	384.11	386.21	384.91	385.23
2008	Oct	382.98	386.35	383.39	384.98
2008	Sep	383.07	386.31	382.28	385.03
2008	Aug	384.15	385.88	382.49	385.14
2008	Jul	386.38	385.89	383.79	384.98
2008	Jun	387.88	385.56	385.34	384.76
2008	May	388.50	385.42	386.30	384.69
2008	Apr	387.18	384.50	386.32	384.51
2008	Mar	385.96	384.46	385.97	384.38
2008	Feb	385.72	384.83	385.64	384.29
2008	Jan	385.42	385.15	385.01	384.01
2007	Dec	383.84	384.64	384.20	383.65
2007	Nov	382.37	384.47	383.17	383.50
2007	Oct	381.09	384.46	381.86	383.45
2007	Sep	380.81	384.05	380.49	383.24
2007	Aug	381.96	383.68	380.15	382.80
2007	Jul	384.45	383.96	381.40	382.58
2007	Jun	386.01	383.68	383.05	382.47
2007	May	386.53	383.46	383.95	382.33
2007	Apr	386.36	383.68	384.11	382.30
2007	Mar	384.42	382.93	383.80	382.20
2007	Feb	383.77	382.87	383.34	381.99
2007	Jan	382.88	382.61	382.81	381.81
2006	Dec	381.85	382.64	382.13	381.59
2006	Nov	380.17	382.27	381.14	381.45
2006	Oct	379.06	382.43	379.75	381.34
2006	Sep	378.81	382.06	378.39	381.13
2006	Aug	380.33	382.05	378.33	380.98
2006	Jul	382.15	381.66	379.87	381.05
2006	Jun	384.01	381.68	381.50	380.93
2006	May	384.94	381.87	382.35	380.72
2006	Apr	384.65	381.96	382.40	380.60
2006	Mar	382.65	381.16	382.09	380.49
2006	Feb	382.19	381.29	381.69	380.34
2006	Jan	381.36	381.09	381.03	380.03
2005	Dec	380.07	380.83	380.27	379.73
2005	Nov	378.29	380.41	379.26	379.58
2005	Oct	376.98	380.32	377.78	379.37
2005	Sep	376.72	380.06	376.53	379.27
2005	Aug	378.60	380.30	376.57	379.23
2005	Jul	380.60	380.12	377.77	378.95
2005	Jun	382.14	379.76	379.41	378.84
2005	May	382.45	379.35	380.24	378.62
2005	Apr	382.20	379.45	380.13	378.32
2005	Mar	380.91	379.47	379.58	377.98
2005	Feb	379.70	378.83	378.95	377.60
2005	Jan	378.43	378.18	378.54	377.53
2004	Dec	377.51	378.25	377.95	377.47
2004	Nov	376.15	378.24	376.96	377.25
2004	Oct	374.47	377.78	375.51	377.02
2004	Sep	374.10	377.41	374.20	376.84
2004	Aug	376.07	377.69	374.33	376.85
2004	Jul	377.48	377.07	375.82	376.89
2004	Jun	379.66	377.36	377.35	376.81
2004	May	380.62	377.60	378.18	376.63
2004	Apr	380.42	377.63	378.25	376.50
2004	Mar	378.88	377.34	377.91	376.37
2004	Feb	377.87	377.00	377.51	376.25
2004	Jan	377.03	376.87	376.97	376.04
2003	Dec	375.97	376.71	376.31	375.80
2003	Nov	374.67	376.70	375.47	375.73
2003	Oct	373.10	376.39	374.17	375.64
2003	Sep	373.12	376.44	372.88	375.47
2003	Aug	374.28	375.85	372.70	375.20
2003	Jul	376.65	376.11	373.93	375.03
2003	Jun	378.21	375.96	375.46	374.96
2003	May	378.54	375.68	376.30	374.77
2003	Apr	377.75	375.04	376.18	374.47
2003	Mar	376.51	374.95	375.72	374.22
2003	Feb	375.63	374.81	375.28	374.06
2003	Jan	374.92	374.72	374.77	373.84
2002	Dec	373.71	374.45	374.13	373.62
2002	Nov	372.19	374.16	373.11	373.33
2002	Oct	370.50	373.77	371.73	373.15
2002	Sep	370.72	374.02	370.45	373.01
2002	Aug	371.77	373.36	370.13	372.67
2002	Jul	373.91	373.40	371.25	372.42
2002	Jun	375.44	373.21	372.68	372.16
2002	May	375.58	372.79	373.54	371.99
2002	Apr	374.93	372.25	373.56	371.84
2002	Mar	373.87	372.26	373.21	371.72
2002	Feb	373.08	372.24	372.69	371.49
2002	Jan	372.38	372.18	372.31	371.37
2001	Dec	371.11	371.83	371.81	371.27
2001	Nov	369.64	371.64	370.87	371.07
2001	Oct	368.38	371.71	369.50	370.92
2001	Sep	368.12	371.45	368.15	370.74
2001	Aug	369.59	371.25	368.12	370.69
2001	Jul	371.51	370.92	369.28	370.47
2001	Jun	373.13	370.85	370.66	370.09
2001	May	373.77	370.90	371.53	369.98
2001	Apr	373.32	370.66	371.61	369.90
2001	Mar	372.39	370.82	371.30	369.84
2001	Feb	371.44	370.64	370.90	369.69
2001	Jan	370.47	370.24	370.43	369.48
2000	Dec	369.62	370.33	369.92	369.40
2000	Nov	368.27	370.31	369.11	369.35
2000	Oct	366.94	370.23	367.72	369.14
2000	Sep	366.87	370.19	366.49	369.06
2000	Aug	368.18	369.71	366.52	368.98
2000	Jul	369.69	369.04	367.69	368.75
2000	Jun	371.51	369.25	369.11	368.56
2000	May	371.32	368.45	370.04	368.50
2000	Apr	371.63	369.01	370.15	368.47
2000	Mar	370.38	368.90	369.80	368.40
2000	Feb	369.32	368.51	369.48	368.34
2000	Jan	369.07	368.87	369.20	368.28
1999	Dec	367.85	368.58	368.68	368.16
1999	Nov	366.51	368.58	367.85	368.06
1999	Oct	365.17	368.41	366.57	367.97
1999	Sep	364.61	367.95	365.25	367.81
1999	Aug	366.70	368.21	365.06	367.52
1999	Jul	369.10	368.42	366.40	367.42
1999	Jun	370.10	367.87	368.11	367.52
1999	May	370.66	367.84	368.98	367.47
1999	Apr	370.77	368.19	369.04	367.41
1999	Mar	369.46	367.90	368.64	367.28
1999	Feb	368.83	367.97	368.27	367.14
1999	Jan	367.97	367.79	367.89	366.97
1998	Dec	366.87	367.61	367.26	366.76
1998	Nov	365.36	367.40	366.44	366.65
1998	Oct	364.18	367.45	365.20	366.62
1998	Sep	363.83	367.20	363.87	366.42
1998	Aug	365.81	367.33	363.58	366.01
1998	Jul	367.59	366.88	364.59	365.58
1998	Jun	368.78	366.57	366.01	365.44
1998	May	369.33	366.48	366.57	365.08
1998	Apr	368.42	365.80	366.32	364.69
1998	Mar	366.95	365.39	365.70	364.34
1998	Feb	365.82	364.98	365.23	364.10
1998	Jan	365.00	364.86	364.91	364.00
1997	Dec	364.12	364.89	364.39	363.89
1997	Nov	362.21	364.29	363.33	363.55
1997	Oct	360.49	363.78	361.65	363.08
1997	Sep	360.05	363.45	360.14	362.68
1997	Aug	361.89	363.43	360.14	362.59
1997	Jul	364.10	363.33	361.66	362.64
1997	Jun	365.36	363.16	363.30	362.73
1997	May	366.47	363.58	364.19	362.69
1997	Apr	366.02	363.33	364.14	362.51
1997	Mar	364.25	362.70	363.65	362.29
1997	Feb	363.87	363.03	363.29	362.16
1997	Jan	362.81	362.64	362.98	362.06
1996	Dec	361.96	362.78	362.36	361.88
1996	Nov	360.62	362.74	361.53	361.79
1996	Oct	359.34	362.61	360.40	361.85
1996	Sep	359.41	362.78	359.40	361.98
1996	Aug	361.15	362.69	359.77	362.21
1996	Jul	363.31	362.61	361.27	362.23
1996	Jun	364.70	362.48	362.54	361.92
1996	May	364.93	361.91	362.94	361.39
1996	Apr	364.28	361.63	362.79	361.12
1996	Mar	363.91	362.36	362.45	361.08
1996	Feb	362.94	362.10	362.16	361.03
1996	Jan	361.83	361.68	361.83	360.94
1995	Dec	360.42	361.29	361.31	360.88
1995	Nov	359.22	361.35	360.43	360.77
1995	Oct	357.80	361.18	359.07	360.59
1995	Sep	357.93	361.36	357.69	360.33
1995	Aug	358.94	360.63	357.40	359.87
1995	Jul	361.55	360.96	358.69	359.63
1995	Jun	363.03	360.58	360.28	359.55
1995	May	363.62	360.42	361.11	359.47
1995	Apr	363.05	360.34	361.22	359.50
1995	Mar	361.60	359.99	360.78	359.39
1995	Feb	360.61	359.78	360.29	359.17
1995	Jan	359.73	359.59	359.81	358.95
1994	Dec	358.74	359.65	359.26	358.87
1994	Nov	357.41	359.50	358.39	358.73
1994	Oct	355.89	359.23	356.91	358.40
1994	Sep	355.42	358.78	355.71	358.29
1994	Aug	357.23	358.92	355.85	358.34
1994	Jul	359.20	358.63	357.04	358.04
1994	Jun	360.60	358.22	358.46	357.77
1994	May	361.48	358.30	359.41	357.76
1994	Apr	361.13	358.41	359.41	357.66
1994	Mar	359.67	358.05	359.05	357.63
1994	Feb	358.80	358.00	358.71	357.57
1994	Jan	358.05	357.95	358.18	357.33
1993	Dec	356.70	357.59	357.59	357.17
1993	Nov	355.27	357.38	356.67	357.00
1993	Oct	354.03	357.37	355.43	356.90
1993	Sep	353.96	357.39	354.21	356.83
1993	Aug	355.29	357.07	354.15	356.77
1993	Jul	357.36	356.87	355.46	356.65
1993	Jun	359.41	356.96	357.15	356.43
1993	May	360.07	356.85	358.16	356.47
1993	Apr	359.17	356.49	358.19	356.39
1993	Mar	358.26	356.53	357.72	356.23
1993	Feb	357.17	356.32	357.29	356.09
1993	Jan	356.76	356.63	356.94	356.05
1992	Dec	355.39	356.27	356.48	356.09
1992	Nov	354.15	356.29	355.74	356.12
1992	Oct	353.21	356.50	354.55	356.05
1992	Sep	352.80	356.25	353.28	355.91
1992	Aug	354.77	356.47	353.39	355.98
1992	Jul	356.72	356.25	355.01	356.18
1992	Jun	359.19	356.72	356.70	356.02
1992	May	359.45	356.19	357.58	355.86
1992	Apr	358.91	356.15	357.52	355.65
1992	Mar	357.73	356.13	357.05	355.52
1992	Feb	356.84	356.07	356.69	355.50
1992	Jan	356.08	355.94	356.35	355.48
1991	Dec	354.98	355.91	355.70	355.33
1991	Nov	353.70	355.86	354.83	355.23
1991	Oct	352.22	355.51	353.76	355.24
1991	Sep	352.20	355.57	352.74	355.34
1991	Aug	353.78	355.49	352.78	355.38
1991	Jul	355.96	355.45	354.31	355.46
1991	Jun	357.99	355.53	356.01	355.29
1991	May	359.00	355.75	356.90	355.17
1991	Apr	358.40	355.67	357.01	355.16
1991	Mar	357.00	355.40	356.48	354.97
1991	Feb	355.67	354.85	355.93	354.73
1991	Jan	354.87	354.75	355.56	354.70
1990	Dec	354.21	355.15	354.96	354.64
1990	Nov	352.81	354.95	354.14	354.49
1990	Oct	351.36	354.60	352.97	354.37
1990	Sep	351.05	354.28	351.61	354.11
1990	Aug	352.67	354.24	351.34	353.80
1990	Jul	354.67	354.04	352.46	353.46
1990	Jun	356.11	353.67	354.10	353.42
1990	May	357.08	353.90	355.20	353.51
1990	Apr	356.10	353.48	355.28	353.49
1990	Mar	355.49	354.01	354.95	353.52
1990	Feb	354.72	354.02	354.66	353.59
1990	Jan	353.63	353.55	354.23	353.48
1989	Dec	352.66	353.56	353.64	353.30
1989	Nov	351.26	353.34	352.80	353.12
1989	Oct	350.10	353.34	351.64	352.99
1989	Sep	349.83	352.96	350.36	352.79
1989	Aug	351.42	352.93	350.03	352.43
1989	Jul	353.79	353.10	351.36	352.33
1989	Jun	355.11	352.73	353.09	352.45
1989	May	355.70	352.57	354.04	352.42
1989	Apr	355.43	352.81	354.19	352.47
1989	Mar	353.64	352.26	353.81	352.44
1989	Feb	353.10	352.46	353.27	352.23
1989	Jan	352.72	352.69	352.82	352.07
1988	Dec	351.29	352.16	352.31	351.96
1988	Nov	349.99	352.07	351.41	351.71
1988	Oct	348.94	352.15	350.20	351.55
1988	Sep	348.84	351.98	349.06	351.44
1988	Aug	350.42	351.90	348.96	351.30
1988	Jul	352.53	351.78	350.22	351.18
1988	Jun	353.64	351.34	351.63	351.02
1988	May	354.14	351.04	352.27	350.72
1988	Apr	353.53	350.95	352.13	350.42
1988	Mar	352.22	350.77	351.67	350.27
1988	Feb	351.58	350.97	351.28	350.27
1988	Jan	350.23	350.23	350.70	349.99
1987	Dec	349.03	349.90	349.96	349.66
1987	Nov	347.80	349.91	348.95	349.28
1987	Oct	346.48	349.68	347.70	349.07
1987	Sep	346.37	349.49	346.50	348.86
1987	Aug	347.62	349.01	346.36	348.60
1987	Jul	349.77	348.97	347.58	348.39
1987	Jun	351.45	349.14	349.24	348.66
1987	May	351.84	348.80	350.06	348.56
1987	Apr	351.12	348.62	349.78	348.15
1987	Mar	349.56	348.19	349.09	347.73
1987	Feb	348.55	347.89	348.37	347.34
1987	Jan	348.20	348.17	347.78	347.06
1986	Dec	346.89	347.82	347.55	347.26
1986	Nov	345.67	347.80	347.21	347.55
1986	Oct	344.34	347.60	345.94	347.35
1986	Sep	344.88	347.99	344.70	347.13
1986	Aug	345.89	347.28	344.71	346.98
1986	Jul	347.78	346.99	345.97	346.76
1986	Jun	349.70	347.28	347.45	346.70
1986	May	350.35	347.23	348.09	346.55
1986	Apr	349.57	347.01	348.02	346.40
1986	Mar	347.88	346.53	347.49	346.15
1986	Feb	346.95	346.36	347.06	346.06
1986	Jan	346.42	346.43	346.84	346.15
1985	Dec	345.61	346.52	346.35	346.10
1985	Nov	344.22	346.35	345.58	345.94
1985	Oct	342.92	346.24	344.44	345.86
1985	Sep	343.04	346.24	343.19	345.62
1985	Aug	344.70	346.19	343.15	345.38
1985	Jul	346.49	345.80	344.49	345.28
1985	Jun	348.19	345.71	345.84	345.04
1985	May	348.75	345.56	346.39	344.85
1985	Apr	348.02	345.40	346.62	345.01
1985	Mar	347.49	346.00	346.35	345.02
1985	Feb	345.89	345.26	345.49	344.48
1985	Jan	345.08	345.13	345.04	344.36
1984	Dec	344.36	345.27	344.64	344.42
1984	Nov	342.90	345.03	343.74	344.12
1984	Oct	341.54	344.85	342.62	344.05
1984	Sep	341.24	344.41	341.81	344.18
1984	Aug	343.06	344.51	341.92	344.03
1984	Jul	345.37	344.70	342.99	343.67
1984	Jun	346.80	344.33	344.32	343.57
1984	May	347.36	344.19	344.98	343.48
1984	Apr	346.58	343.98	344.87	343.27
1984	Mar	345.29	343.77	344.65	343.32
1984	Feb	344.59	344.00	344.50	343.53
1984	Jan	343.87	343.94	344.02	343.40
1983	Dec	342.89	343.79	343.13	342.93
1983	Nov	341.35	343.49	342.34	342.71
1983	Oct	340.12	343.43	341.25	342.66
1983	Sep	340.00	343.26	340.17	342.53
1983	Aug	342.08	343.55	340.48	342.64
1983	Jul	343.93	343.23	342.01	342.73
1983	Jun	345.32	342.85	343.21	342.39
1983	May	345.75	342.59	343.44	341.94
1983	Apr	345.08	342.46	343.17	341.61
1983	Mar	343.45	341.82	342.72	341.38
1983	Feb	342.67	342.09	342.39	341.39
1983	Jan	341.42	341.51	342.00	341.39
1982	Dec	340.67	341.61	341.44	341.24
1982	Nov	339.24	341.39	340.66	341.03
1982	Oct	338.09	341.39	339.32	340.73
1982	Sep	337.98	341.28	337.91	340.27
1982	Aug	339.82	341.24	337.90	340.05
1982	Jul	341.85	341.08	339.55	340.27
1982	Jun	343.42	340.97	341.21	340.38
1982	May	344.30	341.29	341.96	340.47
1982	Apr	343.83	341.23	342.09	340.53
1982	Mar	342.87	341.15	341.84	340.50
1982	Feb	341.69	341.08	341.56	340.55
1982	Jan	340.92	340.98	340.98	340.38
1981	Dec	339.91	340.91	340.39	340.19
1981	Nov	338.58	340.74	339.79	340.17
1981	Oct	337.13	340.41	338.68	340.09
1981	Sep	336.96	340.20	337.75	340.12
1981	Aug	338.51	339.94	337.98	340.13
1981	Jul	340.71	339.95	339.07	339.80
1981	Jun	342.52	340.02	340.43	339.60
1981	May	343.01	340.03	341.14	339.65
1981	Apr	342.56	339.93	341.34	339.78
1981	Mar	341.57	339.91	341.08	339.75
1981	Feb	340.51	339.93	340.45	339.43
1981	Jan	339.36	339.35	339.91	339.31
1980	Dec	338.29	339.30	339.40	339.19
1980	Nov	337.21	339.42	338.63	339.01
1980	Oct	336.05	339.35	337.50	338.90
1980	Sep	336.10	339.36	336.85	339.22
1980	Aug	337.45	338.90	337.27	339.42
1980	Jul	339.34	338.59	338.55	339.28
1980	Jun	341.26	338.72	339.79	338.96
1980	May	341.47	338.44	340.09	338.61
1980	Apr	340.86	338.18	339.67	338.10
1980	Mar	340.04	338.30	339.30	337.98
1980	Feb	338.28	337.75	339.03	338.01
1980	Jan	337.80	337.83	338.31	337.71
1979	Dec	336.78	337.78
1979	Nov	335.26	337.44
1979	Oct	334.12	337.34
1979	Sep	333.93	337.08
1979	Aug	335.56	336.97
1979	Jul	337.60	336.84
1979	Jun	339.20	336.82
1979	May	339.02	336.16
1979	Apr	338.96	336.29
1979	Mar	338.13	336.40
1979	Feb	336.64	336.05
1979	Jan	336.21	336.22
1978	Dec	334.83	335.86
1978	Nov	333.76	335.95
1978	Oct	332.40	335.62
1978	Sep	332.33	335.41
1978	Aug	334.37	335.70
1978	Jul	336.48	335.69
1978	Jun	337.98	335.59
1978	May	338.00	335.15
1978	Apr	337.77	335.15
1978	Mar	336.61	334.99
1978	Feb	335.26	334.69
1978	Jan	335.09	335.10
1977	Dec	333.47	334.55
1977	Nov	332.35	334.51
1977	Oct	331.21	334.38
1977	Sep	331.19	334.20
1977	Aug	332.53	333.75
1977	Jul	334.79	333.95
1977	Jun	336.10	333.76
1977	May	336.82	333.97
1977	Apr	336.03	333.43
1977	Mar	334.97	333.41
1977	Feb	333.23	332.69
1977	Jan	332.69	332.76
1976	Dec	331.65	332.75
1976	Nov	330.18	332.28
1976	Oct	328.77	331.97
1976	Sep	328.96	331.97
1976	Aug	330.64	331.93
1976	Jul	332.95	332.20
1976	Jun	334.05	331.67
1976	May	334.79	331.85
1976	Apr	334.78	332.18
1976	Mar	333.46	331.94
1976	Feb	332.75	332.15
1976	Jan	331.66	331.73
1975	Dec	330.55	331.56
1975	Nov	329.33	331.39
1975	Oct	328.35	331.51
1975	Sep	328.57	331.53
1975	Aug	329.88	331.13
1975	Jul	331.74	330.97
1975	Jun	333.40	331.15
1975	May	333.91	330.92
1975	Apr	333.29	330.71
1975	Mar	331.85	330.48
1975	Feb	331.41	330.80
1975	Jan	330.68	330.78
1974	Dec	329.50	330.50
1974	Nov	328.34	330.36
1974	Oct	327.21	330.29
1974	Sep	327.41	330.30
1974	Aug	329.17	330.31
1974	Jul	330.99	330.19
1974	Jun	332.13	329.95
1974	May	333.15	330.19
1974	Apr	332.65	330.24
1974	Mar	331.48	330.21
1974	Feb	330.71	330.08
1974	Jan	329.35	329.48
1973	Dec	328.64	329.63
1973	Nov	328.16	330.14
1973	Oct	327.18	330.19
1973	Sep	327.51	330.26
1973	Aug	329.31	330.38
1973	Jul	330.87	330.00
1973	Jun	332.07	330.03
1973	May	332.48	329.68
1973	Apr	331.50	329.14
1973	Mar	330.30	329.10
1973	Feb	329.56	328.89
1973	Jan	328.55	328.69
1972	Dec	327.55	328.53
1972	Nov	326.50	328.52
1972	Oct	325.06	328.07
1972	Sep	324.93	327.73
1972	Aug	326.32	327.36
1972	Jul	328.05	327.16
1972	Jun	329.09	326.97
1972	May	330.07	327.24
1972	Apr	329.72	327.39
1972	Mar	327.75	326.56
1972	Feb	327.63	327.01
1972	Jan	326.77	326.89
1971	Dec	326.01	326.92
1971	Nov	324.80	326.74
1971	Oct	323.56	326.55
1971	Sep	323.36	326.15
1971	Aug	325.46	326.52
1971	Jul	327.34	326.48
1971	Jun	328.57	326.46
1971	May	328.92	326.14
1971	Apr	327.78	325.49
1971	Mar	327.18	325.98
1971	Feb	326.68	326.09
1971	Jan	326.17	326.30
1970	Dec	325.13	325.92
1970	Nov	323.98	325.96
1970	Oct	323.16	326.27
1970	Sep	323.10	326.01
1970	Aug	324.69	325.86
1970	Jul	326.35	325.57
1970	Jun	327.66	325.47
1970	May	328.07	325.23
1970	Apr	328.14	325.81
1970	Mar	326.87	325.67
1970	Feb	325.99	325.38
1970	Jan	325.03	325.01
1969	Dec	324.12	324.97
1969	Nov	322.85	324.83
1969	Oct	321.78	324.90
1969	Sep	322.38	325.23
1969	Aug	323.67	324.83
1969	Jul	325.88	324.98
1969	Jun	326.76	324.61
1969	May	327.34	324.58
1969	Apr	326.66	324.29
1969	Mar	325.64	324.45
1969	Feb	324.42	323.83
1969	Jan	324.00	324.00
1968	Dec	322.84	323.73
1968	Nov	321.31	323.24
1968	Oct	320.25	323.33
1968	Sep	320.41	323.16
1968	Aug	322.03	323.15
1968	Jul	324.14	323.17
1968	Jun	325.36	323.24
1968	May	325.57	322.93
1968	Apr	325.02	322.73
1968	Mar	323.89	322.67
1968	Feb	323.15	322.57
1968	Jan	322.57	322.60
1967	Dec	321.96	322.85
1967	Nov	320.72	322.70
1967	Oct	319.31	322.45
1967	Sep	319.31	322.12
1967	Aug	320.92	322.08
1967	Jul	322.55	321.62
1967	Jun	324.09	321.92
1967	May	325.00	322.35
1967	Apr	324.42	321.99
1967	Mar	323.04	321.80
1967	Feb	322.50	321.91
1967	Jan	322.06	322.08
1966	Dec	321.08	321.97
1966	Nov	319.78	321.75
1966	Oct	318.10	321.26
1966	Sep	318.64	321.47
1966	Aug	320.37	321.57
1966	Jul	322.40	321.54
1966	Jun	323.75	321.48
1966	May	324.01	321.23
1966	Apr	323.87	321.43
1966	Mar	322.39	321.22
1966	Feb	321.59	321.05
1966	Jan	320.62	320.63
1965	Dec	319.42	320.34
1965	Nov	318.87	320.77
1965	Oct	317.30	320.37
1965	Sep	317.81	320.64
1965	Aug	318.80	319.97
1965	Jul	321.39	320.54
1965	Jun	321.87	319.63
1965	May	322.16	319.42
1965	Apr	322.13	319.72
1965	Mar	320.89	319.72
1965	Feb	320.44	319.92
1965	Jan	319.44	319.48
1964	Dec	318.71	319.68
1964	Nov	317.79	319.77
1964	Oct	316.79	319.87
1964	Sep	316.70	319.53
1964	Aug	318.70	319.82
1964	Jul	320.44	319.48
1964	Jun	321.89	319.66
1964	May	322.24	319.45
1964	Apr	321.79	319.51
1964	Mar	320.76	319.56
1964	Feb	320.11	319.62
1964	Jan	319.57	319.67
1963	Dec	318.31	319.33
1963	Nov	317.12	319.06
1963	Oct	315.99	319.03
1963	Sep	316.21	318.98
1963	Aug	317.77	318.95
1963	Jul	319.74	318.87
1963	Jun	321.47	319.12
1963	May	322.24	319.39
1963	Apr	321.39	318.99
1963	Mar	319.86	318.72
1963	Feb	319.08	318.60
1963	Jan	318.74	318.89
1962	Dec	317.70	318.67
1962	Nov	316.69	318.61
1962	Oct	315.42	318.43
1962	Sep	316.26	318.90
1962	Aug	317.40	318.46
1962	Jul	319.58	318.69
1962	Jun	320.55	318.29
1962	May	321.01	318.28
1962	Apr	320.63	318.39
1962	Mar	319.68	318.66
1962	Feb	318.55	318.01
1962	Jan	317.94	318.02
1961	Dec	317.01	317.98
1961	Nov	316.10	318.02
1961	Oct	315.38	318.39
1961	Sep	314.80	317.44
1961	Aug	316.79	317.85
1961	Jul	318.58	317.69
1961	Jun	319.77	317.51
1961	May	320.58	317.85
1961	Apr	319.48	317.24
1961	Mar	318.54	317.52
1961	Feb	317.70	317.16
1961	Jan	316.93	317.01
1960	Dec	316.19	317.16
1960	Nov	315.00	316.92
1960	Oct	313.83	316.84
1960	Sep	314.16	316.80
1960	Aug	315.91	316.97
1960	Jul	318.18	317.29
1960	Jun	319.59	317.33
1960	May	320.02	317.29
1960	Apr	319.02	316.78
1960	Mar	317.58	316.56
1960	Feb	316.97	316.43
1960	Jan	316.43	316.51
1959	Dec	315.59	316.56
1959	Nov	314.80	316.72
1959	Oct	313.26	316.27
1959	Sep	313.84	316.48
1959	Aug	314.80	315.86
1959	Jul	316.55	315.66
1959	Jun	318.16	315.90
1959	May	318.29	315.56
1959	Apr	317.72	315.48
1959	Mar	316.71	315.69
1959	Feb	316.38	315.84
1959	Jan	315.62	315.70
1958	Dec	314.67	315.64
1958	Nov	313.33	315.25
1958	Oct	312.61	315.54
1958	Sep	313.20	315.84
1958	Aug	314.93	315.99
1958	Jul	315.86	314.97
1958	Jun	317.11	314.87
1958	May	317.50	314.77
1958	Apr	317.45	315.21
1958	Mar	315.71	314.69