Year	thousand metric tons of CO2 equivalent
1990	33353.054
1991	32043.5526
1992	32320.782
1993	32665.7766
1994	32662.6476
1995	31616.3696
1996	32091.5604
1997	32099.5766
1998	33363.6628
1999	32653.0818
2000	33038.4256
2001	33461.6452
2002	31991.4324
2003	32418.079
2004	31251.3792
2005	33239.6352
2006	32309.3388
2007	33175.3566
2008	32243.9874
2009	32886.8032
2010	33332.8198
2011	35601.0468
2012	34819.6312
2013	36047.0336
2014	35820.941
2015	34234.8062
2016	37169.3016
2017	37454.875
2018	36816.9166
2019	37240.3746
2020	37980.994