Year	thousand metric tons of CO2 equivalent
1990	43.0675
1991	44.1075
1992	50.8125
1993	52.255
1994	48.05
1995	50.6025
1996	47.025
1997	49.4075
1998	53.375
1999	53.1275
2000	51.55
2001	49.4325
2002	50.78
2003	49.6325
2004	54.98
2005	54.2875
2006	52.4325
2007	49.9475
2008	49.3775
2009	53.6825
2010	56.32
2011	56.895
2012	57.65
2013	58.565
2014	59.425
2015	60.3325
2016	61.235
2017	52.9675
2018	52.97
2019	53.1275
2020	56.755