Year	thousand metric tons of CO2 equivalent
1990	21391.1725
1991	20864.645
1992	22457.3425
1993	22627.2525
1994	22860.69
1995	23218.15
1996	23859.9225
1997	23894.0425
1998	24544.45
1999	24062.1375
2000	23281.89
2001	23038.71
2002	22594.345
2003	22744.6225
2004	23022.2825
2005	23366.95
2006	23490.2175
2007	23549.12
2008	20987.3
2009	21336.97
2010	21604.3025
2011	20798.245
2012	21010.1375
2013	20882.655
2014	16004.9075
2015	16982.045
2016	17937.49
2017	16019.3625
2018	16793.575
2019	16992.035
2020	17873.3025