Year	thousand metric tons of CO2 equivalent
1990	16315.649
1991	16580.0048
1992	16849.5458
1993	17400.518
1994	17667.6154
1995	17705.074
1996	18578.6312
1997	19105.227
1998	20592.4854
1999	20727.6582
2000	20936.9436
2001	21039.1278
2002	21174.6582
2003	22142.8602
2004	22098.0708
2005	23995.3772
2006	23828.6164
2007	23176.8606
2008	23628.271
2009	22860.8018
2010	24849.028
2011	25587.3528
2012	26389.4794
2013	27106.3482
2014	27479.4144
2015	27539.5508
2016	29749.34
2017	30736.7332
2018	30890.6502
2019	31450.2048
2020	31817.9368