Year	thousand metric tons of CO2 equivalent
1990	35.490624
1991	35.847209
1992	34.773393
1993	35.725978
1994	39.449963
1995	38.793348
1996	38.87504
1997	38.956733
1998	39.723825
1999	40.163118
2000	40.542811
2001	43.056822
2002	43.246434
2003	44.032045
2004	44.847457
2005	44.947669
2006	44.717598
2007	43.444528
2008	42.976058
2009	46.917988
2010	50.710918
2011	53.39117
2012	54.998622
2013	56.159074
2014	56.395726
2015	61.310978
2016	55.220028
2017	52.705077
2018	56.120327
2019	42.549576
2020	50.494426