Year	thousand metric tons of CO2 equivalent
1990	18983.1275
1991	19066.8
1992	18977.3825
1993	19278.625
1994	19349.485
1995	21432.275
1996	20200.395
1997	19939.6425
1998	22108.5125
1999	22674.2525
2000	21350.8525
2001	21913.62
2002	24114.525
2003	26366.36
2004	25609.66
2005	27002.505
2006	25611.0175
2007	26605.365
2008	28189.9475
2009	28260.2125
2010	30081.9475
2011	31462.965
2012	31983.2575
2013	33543.7975
2014	34418.505
2015	36111.23
2016	35841.1025
2017	34909.065
2018	35106.375
2019	36057.18
2020	38629.095