Year	thousand metric tons of CO2 equivalent
1990	538.760073
1991	540.361881
1992	402.757312
1993	422.670624
1994	414.053936
1995	410.658406
1996	409.158195
1997	409.402692
1998	405.031955
1999	399.850538
2000	411.056878
2001	414.263347
2002	429.653924
2003	438.490964
2004	460.137884
2005	505.141567
2006	501.418343
2007	482.547104
2008	485.136786
2009	468.115401
2010	495.178528
2011	437.514078
2012	495.589889
2013	489.73292
2014	519.55234
2015	527.820108
2016	538.862624
2017	537.844679
2018	541.026733
2019	529.808788
2020	527.190843