Year	thousand metric tons of CO2 equivalent
1990	3778.918643
1991	3791.29996
1992	3714.73277
1993	3706.234684
1994	3700.325419
1995	3741.183765
1996	3800.051299
1997	3731.644523
1998	3731.250572
1999	3817.07561
2000	2721.3956
2001	2670.0502
2002	3534.3992
2003	3428.9966
2004	3394.7564
2005	3342.1892
2006	3273.1724
2007	3331.044
2008	3238.9918
2009	3376.1612
2010	3459.0648
2011	3416.9872
2012	3377.532
2013	3372.9428
2014	3445.5952
2015	3483.0538
2016	3353.245
2017	3315.4884
2018	3348.477
2019	3354.5264
2020	3332.7724