Year	thousand metric tons of CO2 equivalent
1990	26702.9
1991	3454.2
1992	5001.5
1993	7782.1
1994	10479
1995	10927.6
1996	11000.5
1997	19467.1
1998	29979.7
1999	35634
2000	37216.3
2001	35384.9
2002	30427
2003	23570.3
2004	32154.3
2005	29858.7
2006	31175
2007	32224.9
2008	35887.2
2009	38158.5
2010	39411.8
2011	43619.1
2012	51073.2
2013	53287.8
2014	56708
2015	66326.2
2016	74334.8
2017	74837.9
2018	75829.4
2019	77959.9
2020	70020.8