Year	thousand metric tons of CO2 equivalent
1990	34258.331640000004
1991	32242.354821
1992	30263.094379000002
1993	31168.237069
1994	29413.232014999998
1995	29112.292206000002
1996	29563.175941000005
1997	28214.69723
1998	26501.582168999998
1999	25131.247324
2000	23666.897848999997
2001	23234.502428
2002	22963.425454000004
2003	23294.354904
2004	22613.869566
2005	23400.254517000005
2006	23546.329674
2007	22614.148088
2008	22964.422824
2009	22271.742694
2010	23235.929184000004
2011	22952.142438
2012	22369.350537000002
2013	21225.739565
2014	20521.216912000004
2015	20538.608285000002
2016	20317.102093
2017	20542.611094
2018	21285.620094000005
2019	20842.329096
2020	20692.738097