Year	thousand metric tons of CO2 equivalent
1990	66.1
1991	67.9
1992	69.9
1993	72.6
1994	75.1
1995	77.1
1996	80
1997	100.6
1998	103.7
1999	105.9
2000	67.5
2001	69.9
2002	72
2003	74.9
2004	77.1
2005	79.1
2006	81.3
2007	85.1
2008	88
2009	93.6
2010	99.1
2011	83.6
2012	96.4
2013	121.6
2014	127.4
2015	132.3
2016	133.6
2017	135.4
2018	141.9
2019	149.2
2020	159.9