Year	thousand metric tons of CO2 equivalent
1990	49.468
1991	55.9346
1992	76.1092
1993	76.1092
1994	59.8682
1995	81.3242
1996	51.8818
1997	61.537
1998	72.3246
1999	76.6456
2000	72.3246
2001	64.1296
2002	63.1462
2003	61.537
2004	63.9508
2005	60.8516
2006	57.7822
2007	54.7724
2008	53.1036
2009	57.4842
2010	59.2722
2011	57.5438
2012	58.706
2013	60.0172
2014	60.1066
2015	61.4178
2016	62.0138
2017	50.2726
2018	50.1832
2019	50.7792
2020	53.9976