Year	thousand metric tons of CO2 equivalent
1990	26.3134
1991	30.2172
1992	29.4424
1993	23.2738
1994	15.049
1995	12.9034
1996	13.1418
1997	12.2776
1998	17.4926
1999	16.4198
2000	16.2708
2001	10.579
2002	11.8902
2003	14.155
2004	12.8438
2005	13.6484
2006	12.9332
2007	12.6948
2008	11.8902
2009	12.4266
2010	13.1716
2011	12.516
2012	13.4398
2013	12.3372
2014	14.1848
2015	14.6914
2016	13.7378
2017	13.0226
2018	12.9332
2019	13.4994
2020	13.0822