Year	thousand metric tons of CO2 equivalent
1990	412.079749
1991	431.391191
1992	454.787352
1993	463.003088
1994	480.026742
1995	501.084943
1996	503.276372
1997	519.144542
1998	540.791625
1999	572.43795
2000	597.379152
2001	587.989973
2002	609.42123
2003	607.906412
2004	613.721803
2005	609.509932
2006	610.741179
2007	612.517289
2008	601.072235
2009	618.719758
2010	593.70038
2011	576.632477
2012	537.334558
2013	528.895011
2014	528.942192
2015	555.737371
2016	547.700896
2017	558.900896
2018	551.900896
2019	540.600896
2020	479.600896