Year	thousand metric tons of CO2 equivalent
1969	0
1970	4.574155927
1971	3.571260016
1972	3.442475538
1973	3.405211647
1974	2.801796554
1975	2.730545007
1976	2.079810832
1977	2.081604678
1978	2.224599153
1979	2.251820687
1980	2.124328134
1981	2.116520102
1982	1.930978902
1983	2.112458358
1984	2.107939209
1985	2.035288291
1986	2.038274893
1987	2.023645993
1988	2.128981544
1989	1.387227091
1990	1.04814472
1991	0.983646089
1992	1.049421548
1993	1.116640398
1994	1.123633347
1995	1.126505156
1996	1.132985706
1997	1.153246996
1998	1.160373896
1999	1.187099616
2000	1.222934996
2001	1.238392216
2002	1.30205735
2003	1.3013521
2004	1.361962959
2005	1.362356659
2006	1.386019114
2007	1.400599003
2008	1.407315153