Year	thousand metric tons of CO2 equivalent
1990	39.5744
1991	39.1274
1992	39.2764
1993	39.8724
1994	40.4088
1995	41.1836
1996	41.8094
1997	42.5842
1998	45.3854
1999	48.6634
2000	43.061
2001	44.4318
2002	45.5642
2003	41.4816
2004	41.5412
2005	43.657
2006	44.1636
2007	43.955
2008	45.4152
2009	44.4318
2010	45.4152
2011	46.2198
2012	46.1304
2013	46.5476
2014	46.5774
2015	46.786
2016	46.935
2017	46.7264
2018	46.8158
2019	47.7098
2020	46.8158