Mauna Loa Atmospheric CO2 Concentrations (ppmv) 1958 To 2002 (Feb. 13, 2004)
Year	Jan.	Feb.	March	April	May	June	July	Aug.	Sept.	Oct.	Nov.	Dec.	Annual	Ann.Fit
1958	-99.99	-99.99	315.71	317.45	317.50	-99.99	315.86	314.93	313.19	-99.99	313.34	314.67	-99.99	-99.99
Delta	n/a	n/a	0.94	0.26	0.79	n/a	0.69	-0.13	0.65	n/a	1.47	0.92	n/a	n/a
1959	315.58	316.47	316.65	317.71	318.29	318.16	316.55	314.80	313.84	313.34	314.81	315.59	315.98	316.00
Delta	0.85	0.50	0.93	1.32	1.74	1.43	1.63	1.11	0.32	0.49	0.19	0.60	0.93	0.91
1960	316.43	316.97	317.58	319.03	320.03	319.59	318.18	315.91	314.16	313.83	315.00	316.19	316.91	316.91
Delta	0.46	0.73	0.96	0.45	0.55	0.19	0.40	0.88	0.83	1.48	1.10	0.82	0.74	0.72
1961	316.89	317.70	318.54	319.48	320.58	319.78	318.58	316.79	314.99	315.31	316.10	317.01	317.65	317.63
Delta	1.05	0.86	1.15	1.10	0.43	0.83	1.03	0.61	1.27	0.11	0.59	0.68	0.80	0.83
1962	317.94	318.56	319.69	320.58	321.01	320.61	319.61	317.40	316.26	315.42	316.69	317.69	318.45	318.46
Delta	0.80	0.52	0.17	0.81	1.23	0.86	0.13	0.37	-0.05	0.57	0.38	0.67	0.54	0.56
1963	318.74	319.08	319.86	321.39	322.24	321.47	319.74	317.77	316.21	315.99	317.07	318.36	318.99	319.02
Delta	0.83	n/a	n/a	n/a	-0.01	0.42	0.70	0.93	0.49	0.88	0.61	0.35	n/a	0.50
1964	319.57	-99.99	-99.99	-99.99	322.23	321.89	320.44	318.70	316.70	316.87	317.68	318.71	-99.99	319.52
Delta	-0.13	n/a	n/a	n/a	-0.07	-0.02	0.77	0.17	1.11	0.43	1.19	0.71	n/a	0.57
1965	319.44	320.44	320.89	322.13	322.16	321.87	321.21	318.87	317.81	317.30	318.87	319.42	320.03	320.09
Delta	1.18	1.15	1.50	1.57	1.91	1.88	1.19	1.50	0.83	0.80	0.92	1.61	1.34	1.25
1966	320.62	321.59	322.39	323.70	324.07	323.75	322.40	320.37	318.64	318.10	319.79	321.03	321.37	321.34
Delta	1.71	0.91	0.65	0.72	0.93	0.34	0.15	0.55	0.62	1.29	0.93	0.93	0.81	0.79
1967	322.33	322.50	323.04	324.42	325.00	324.09	322.55	320.92	319.26	319.39	320.72	321.96	322.18	322.13
Delta	0.24	0.65	0.85	0.60	0.57	1.27	1.59	1.19	1.07	0.86	0.60	0.94	0.87	0.98
1968	322.57	323.15	323.89	325.02	325.57	325.36	324.14	322.11	320.33	320.25	321.32	322.90	323.05	323.11
Delta	1.43	1.27	1.75	1.64	1.81	1.34	1.75	1.56	2.05	1.53	1.53	1.22	1.57	1.49
1969	324.00	324.42	325.64	326.66	327.38	326.70	325.89	323.67	322.38	321.78	322.85	324.12	324.62	324.60
Delta	1.06	1.56	1.29	1.47	0.69	0.96	0.46	1.02	0.72	1.29	1.16	1.01	1.06	1.05
1970	325.06	325.98	326.93	328.13	328.07	327.66	326.35	324.69	323.10	323.07	324.01	325.13	325.68	325.65
Delta	1.11	0.70	0.25	-0.35	0.85	0.91	1.02	0.74	0.26	0.49	0.79	0.88	0.64	0.67
1971	326.17	326.68	327.18	327.78	328.92	328.57	327.37	325.43	323.36	323.56	324.80	326.01	326.32	326.32
Delta	0.60	0.95	0.57	1.94	1.15	0.52	0.68	0.89	1.48	1.64	1.70	1.54	1.14	1.20
1972	326.77	327.63	327.75	329.72	330.07	329.09	328.05	326.32	324.84	325.20	326.50	327.55	327.46	327.52
Delta	1.77	1.93	2.55	1.78	2.41	2.98	2.82	2.99	2.67	1.98	1.66	1.09	2.22	2.09
1973	328.54	329.56	330.30	331.50	332.48	332.07	330.87	329.31	327.51	327.18	328.16	328.64	329.68	329.61
Delta	0.81	1.15	1.18	1.15	0.61	0.18	0.31	0.09	-0.07	0.19	0.30	0.94	0.57	0.68
1974	329.35	330.71	331.48	332.65	333.09	332.25	331.18	329.40	327.44	327.37	328.46	329.58	330.25	330.29
Delta	1.05	0.70	0.56	0.66	0.87	1.34	0.73	0.66	1.12	0.97	1.03	1.18	0.90	0.87
1975	330.40	331.41	332.04	333.31	333.96	333.59	331.91	330.06	328.56	328.34	329.49	330.76	331.15	331.16
Delta	1.34	1.15	1.46	1.27	0.91	0.75	1.14	0.88	0.74	0.60	0.82	0.92	1.00	1.02
1976	331.74	332.56	333.50	334.58	334.87	334.34	333.05	330.94	329.30	328.94	330.31	331.68	332.15	332.18
Delta	1.18	0.86	1.20	1.49	1.87	1.93	1.88	1.81	2.28	2.22	2.09	2.17	1.75	1.70
1977	332.92	333.42	334.70	336.07	336.74	336.27	334.93	332.75	331.58	331.16	332.40	333.85	333.90	333.88
Delta	2.05	1.97	1.94	1.69	1.27	1.62	1.61	1.93	1.18	1.38	1.52	1.10	1.60	1.64
1978	334.97	335.39	336.64	337.76	338.01	337.89	336.54	334.68	332.76	332.54	333.92	334.95	335.50	335.52
Delta	1.26	1.37	1.32	1.13	1.46	1.40	1.19	1.41	1.15	1.32	1.37	1.78	1.35	1.37
1979	336.23	336.76	337.96	338.89	339.47	339.29	337.73	336.09	333.91	333.86	335.29	336.73	336.85	336.89
Delta	1.78	1.60	2.12	1.88	1.99	1.88	1.83	1.51	1.97	2.15	1.81	1.48	1.84	1.78
1980	338.01	338.36	340.08	340.77	341.46	341.17	339.56	337.60	335.88	336.01	337.10	338.21	338.69	338.67
Delta	1.22	2.11	1.30	1.74	1.45	1.08	0.93	0.83	0.81	0.84	1.26	1.40	1.24	1.28
1981	339.23	340.47	341.38	342.51	342.91	342.25	340.49	338.43	336.69	336.85	338.36	339.61	339.93	339.95
Delta	1.52	1.14	1.32	1.05	1.22	1.10	1.57	1.39	1.28	1.01	0.90	0.88	1.20	1.14
1982	340.75	341.61	342.70	343.56	344.13	343.35	342.06	339.82	337.97	337.86	339.26	340.49	341.13	341.09
Delta	0.62	0.91	0.40	1.38	1.62	1.97	1.93	2.57	1.89	2.13	1.90	2.50	1.65	1.66
1983	341.37	342.52	343.10	344.94	345.75	345.32	343.99	342.39	339.86	339.99	341.16	342.99	342.78	342.75
Delta	2.33	1.99	2.18	2.14	1.68	1.47	1.41	0.89	1.21	1.36	1.82	1.23	1.64	1.69
1984	343.70	344.51	345.28	347.08	347.43	346.79	345.40	343.28	341.07	341.35	342.98	344.22	344.42	344.44
Delta	1.27	1.49	2.15	1.27	1.50	1.46	1.16	1.41	2.02	1.45	1.26	1.34	1.48	1.42
1985	344.97	346.00	347.43	348.35	348.93	348.25	346.56	344.69	343.09	342.80	344.24	345.56	345.90	345.86
Delta	1.32	0.96	0.43	1.20	1.28	1.29	1.38	1.22	1.77	1.37	1.42	1.34	1.25	1.28
1986	346.29	346.96	347.86	349.55	350.21	349.54	347.94	345.91	344.86	344.17	345.66	346.90	347.15	347.14
Delta	1.73	1.51	1.56	1.44	1.63	1.71	1.58	2.19	1.58	2.19	2.15	2.06	1.78	1.85
1987	348.02	348.47	349.42	350.99	351.84	351.25	349.52	348.10	346.44	346.36	347.81	348.96	348.93	348.99
Delta	2.41	3.25	2.80	2.60	2.38	2.54	2.87	2.34	2.28	2.52	2.26	2.38	2.55	2.45
1988	350.43	351.72	352.22	353.59	354.22	353.79	352.39	350.44	348.72	348.88	350.07	351.34	351.48	351.44
Delta	2.33	1.35	1.46	1.83	1.45	1.34	1.51	1.23	1.08	1.11	1.23	1.19	1.43	1.50
1989	352.76	353.07	353.68	355.42	355.67	355.13	353.90	351.67	349.80	349.99	351.30	352.53	352.91	352.94
Delta	0.90	1.63	1.71	0.78	1.49	1.09	0.92	1.24	1.16	1.19	1.53	1.68	1.28	1.25
1990	353.66	354.70	355.39	356.20	357.16	356.22	354.82	352.91	350.96	351.18	352.83	354.21	354.19	354.19
Delta	1.06	1.05	1.77	2.40	2.18	2.02	1.35	1.12	1.20	1.03	0.92	0.78	1.40	1.43
1991	354.72	355.75	357.16	358.60	359.34	358.24	356.17	354.03	352.16	352.21	353.75	354.99	355.59	355.62
Delta	1.26	0.97	0.65	0.55	0.32	1.01	0.86	0.97	0.85	1.10	0.41	0.41	0.78	0.74
1992	355.98	356.72	357.81	359.15	359.66	359.25	357.03	355.00	353.01	353.31	354.16	355.40	356.37	356.36
Delta	0.72	0.44	0.57	0.31	0.62	0.35	0.54	0.52	0.69	0.67	1.17	1.40	0.67	0.74
1993	356.70	357.16	358.38	359.46	360.28	359.60	357.57	355.52	353.70	353.98	355.33	356.80	357.04	357.10
Delta	1.66	1.75	1.59	1.80	1.40	1.35	1.98	1.97	2.14	2.01	2.25	2.24	1.84	1.76
1994	358.36	358.91	359.97	361.26	361.68	360.95	359.55	357.49	355.84	355.99	357.58	359.04	358.88	358.86
Delta	1.60	2.09	1.67	2.19	2.11	2.31	2.35	1.97	2.22	1.76	1.98	1.66	2.00	2.04
1995	359.96	361.00	361.64	363.45	363.79	363.26	361.90	359.46	358.06	357.75	359.56	360.70	360.88	360.90
Delta	2.09	2.25	2.39	1.27	1.62	1.71	1.75	2.03	1.40	1.85	1.20	1.63	1.76	1.68
1996	362.05	363.25	364.03	364.72	365.41	364.97	363.65	361.49	359.46	359.60	360.76	362.33	362.64	362.58
Delta	1.13	0.75	0.54	1.63	1.38	0.65	0.82	1.02	0.73	1.17	1.67	1.95	1.12	1.26
1997	363.18	364.00	364.57	366.35	366.79	365.62	364.47	362.51	360.19	360.77	362.43	364.28	363.76	363.84
Delta	2.14	2.15	2.74	2.26	2.50	3.25	3.17	3.26	3.71	3.46	3.03	2.69	2.87	2.74
1998	365.32	366.15	367.31	368.61	369.29	368.87	367.64	365.77	363.90	364.23	365.46	366.97	366.63	366.58
Delta	2.83	2.72	2.28	2.53	1.71	1.48	1.63	1.17	0.73	0.89	1.21	1.04	1.68	1.72
1999	368.15	368.87	369.59	371.14	371.00	370.35	369.27	366.94	364.63	365.12	366.67	368.01	368.31	368.30
Delta	0.99	0.59	0.93	0.52	0.82	1.35	0.85	1.18	1.99	1.61	1.62	1.52	1.17	1.17
2000	369.14	369.46	370.52	371.66	371.82	371.70	370.12	368.12	366.62	366.73	368.29	369.53	369.48	369.47
Delta	1.14	2.04	1.60	1.21	2.20	1.60	1.50	1.43	1.34	1.36	1.39	1.71	1.54	1.56
2001	370.28	371.50	372.12	372.87	374.02	373.30	371.62	369.55	367.96	368.09	369.68	371.24	371.02	371.03
Delta	2.15	1.59	1.40	1.99	1.53	2.11	2.40	1.94	2.75	2.15	2.40	2.54	2.08	2.04
2002	372.43	373.09	373.52	374.86	375.55	375.41	374.02	371.49	370.71	370.24	372.08	373.78	373.10	373.07
Source:	http://cdiac.esd.ornl.gov/ftp/maunaloa-co2/maunaloa.co2