Year	thousand metric tons of CO2 equivalent
1990	5362.8378
1991	5238.9294
1992	5475.6308
1993	5545.2436
1994	5645.0438
1995	5805.9042
1996	5826.8536
1997	6125.7476
1998	5580.8248
1999	5299.1552
2000	5064.5994
2001	4796.161
2002	4663.9086
2003	4699.0726
2004	4982.113
2005	5253.0248
2006	4709.1748
2007	5039.478
2008	4760.4904
2009	4609.2852
2010	4704.377
2011	4637.5654
2012	4816.2462
2013	4725.3264
2014	4634.3172
2015	4710.8734
2016	4763.3214
2017	4790.4692
2018	4894.9778
2019	4917.5364
2020	4949.7204