Year	thousand metric tons of CO2 equivalent
1990	4039.113386
1991	4040.303713
1992	4016.144935
1993	3891.236672
1994	3794.906158
1995	3711.182452
1996	3746.102273
1997	3600.746167
1998	3602.070484
1999	3635.698187
2000	3620.776623
2001	3685.526473
2002	3655.521141
2003	3688.95945
2004	3686.624609
2005	3719.03788
2006	3767.385072
2007	3751.542036
2008	3666.305551
2009	3500.489334
2010	3532.202728
2011	3480.036788
2012	3573.580267
2013	3529.641656
2014	3497.774408
2015	3455.258742
2016	3350.50803
2017	3316.20803
2018	3401.60803
2019	3445.00803
2020	2980.60803