Year	thousand metric tons of CO2 equivalent
1990	91.805
1991	93.3175
1992	100.8375
1993	100.3025
1994	96.7525
1995	88.0625
1996	87.0925
1997	90.1425
1998	81.07
1999	88.555
2000	86.2225
2001	84.6525
2002	84.3775
2003	83.91
2004	80.265
2005	84.8125
2006	84.3375
2007	82.505
2008	83.3475
2009	72.64
2010	69.89
2011	61.8125
2012	62.65
2013	63.1175
2014	62.01
2015	60.86
2016	59.1175
2017	56.145
2018	57.14
2019	56.3925
2020	59.4275