Year	thousand metric tons of CO2 equivalent
1990	22501.9025
1991	23913.485
1992	24175.8125
1993	24706.1075
1994	25669.5125
1995	26460.96
1996	27372.5575
1997	28870.98
1998	30235.5625
1999	30894.45
2000	31387.1925
2001	31318.6025
2002	31628.07
2003	32426.625
2004	33237.0775
2005	34853.6975
2006	35279.245
2007	34910.1075
2008	34729.1275
2009	33432.145
2010	35890.4025
2011	39033.29
2012	41120.02
2013	41817.145
2014	42725.845
2015	43256.7
2016	49431.0275
2017	51391.65
2018	52526.235
2019	51780.57
2020	52223.3825