Year	thousand metric tons of CO2 equivalent
1990	3631.3124
1991	3790.6054
1992	3995.305
1993	4165.481
1994	4323.6562
1995	4556.6658
1996	4777.374
1997	4931.5674
1998	5253.438
1999	5495.6472
2000	5686.9158
2001	5997.45824
2002	6241.365881
2003	6500.526521
2004	6730.975162
2005	7091.360402
2006	7391.331963
2007	7739.957723
2008	8143.618084
2009	8436.559645
2010	8402.107805
2011	8616.053725
2012	9183.894444
2013	9589.209163
2014	10113.27668
2015	10483.4808
2016	11046.79369
2017	11541.29177
2018	12107.39085
2019	12622.55713
2020	13245.90022