Year	thousand metric tons of CO2 equivalent
1990	3161628.813
1991	3162078.09
1992	3146661.208
1993	3131415.835
1994	3155442.505
1995	3172022.01
1996	3168004.978
1997	3123178.315
1998	3144925.51
1999	3176165.668
2000	3179840.615
2001	3175797.083
2002	3196398.02
2003	3195046.323
2004	3249326.59
2005	3278054.67
2006	3306798.348
2007	3337712.805
2008	3352683.895
2009	3343305.66
2010	3363051.443
2011	3416325.383
2012	3432104.455
2013	3396658.705
2014	3417875.533
2015	3433276.8
2016	3454768.653
2017	3492707.148
2018	3506635.978
2019	3498541.095
2020	3535186.445