Year	thousand metric tons of CO2 equivalent
1969	0
1970	1.20494365
1971	1.20486894
1972	1.49030361
1973	1.50856075
1974	1.38387286
1975	1.77192869
1976	1.72423054
1977	1.84365928
1978	1.884381873674
1979	1.803787388481
1980	1.928259583674
1981	2.304275270819
1982	2.424635745362
1983	3.035679303296
1984	4.09441853041
1985	3.37440858349
1986	3.04523083928
1987	3.0453970557
1988	4.49119889005
1989	5.42632644381
1990	3.70971169241
1991	3.37192424318
1992	2.7864212546
1993	2.82111756936
1994	2.895261796947
1995	2.766673414655
1996	2.772132640763
1997	2.705517188062
1998	2.99471501
1999	2.930115288
2000	2.54904289
2001	2.666168237
2002	2.651942678
2003	2.702306425
2004	2.959286257
2005	3.121941397
2006	3.270618885
2007	2.930788639
2008	3.038814804