Year	thousand metric tons of CO2 equivalent
1990	15.8536
1991	15.5258
1992	16.1814
1993	15.4662
1994	14.3338
1995	19.221
1996	22.9162
1997	19.7872
1998	27.5352
1999	21.2176
2000	17.4032
2001	18.1184
2002	17.1648
2003	14.6616
2004	28.31
2005	20.0554
2006	18.2674
2007	19.2508
2008	26.1644
2009	19.3402
2010	15.8238
2011	26.075
2012	21.8434
2013	27.3266
2014	20.413
2015	23.3334
2016	27.6544
2017	33.376
2018	28.3696
2019	28.757
2020	27.9524