Year	thousand metric tons of CO2 equivalent
1969	0
1970	0.70206808383549
1971	0.702068293862222
1972	0.655645904600034
1973	0.89101933923465
1974	0.883986121543599
1975	0.855619776662707
1976	0.775646973689057
1977	0.291213258752068
1978	0.525011467691263
1979	0.441089175024823
1980	0.838594285150635
1981	0.777265880744261
1982	0.814485948730937
1983	1.12292130291891
1984	0.61931061412823
1985	0.79740389491959
1986	0.92944849961514
1987	0.92944849961514
1988	1.18096485772818
1989	1.27534190308015
1990	2.33665650567107
1991	2.36891274725973
1992	2.72674644349047
1993	2.91365070274706
1994	3.05169251576993
1995	2.918128703709
1996	3.35118057574236
1997	3.17421360530827
1998	3.38022813392837
1999	3.72809660778122
2000	2.25005740129885
2001	2.20394447802563
2002	1.7239117052425
2003	1.60757945242203
2004	2.40248476432087
2005	3.08171974364875
2006	2.75019647422073
2007	3.24411673961004
2008	3.78884978047184