Year	thousand metric tons of CO2 equivalent
1990	59039.48672
1991	58143.45707
1992	52906.6304
1993	48885.15989
1994	49469.29226
1995	47767.1912
1996	48627.55936
1997	47971.1342
1998	47727.30469
1999	37958.59396
2000	36942.41249
2001	35542.63309
2002	33511.85864
2003	33112.03287
2004	34005.82385
2005	32843.93112
2006	31783.91587
2007	31825.26526
2008	31637.52999
2009	29328.71182
2010	29846.59845
2011	28901.98197
2012	28496.24938
2013	28499.67536
2014	29296.64391
2015	29190.95481
2016	28925.99857
2017	29187.60334
2018	28954.5513
2019	29218.81967
2020	27696.68924