Year	thousand metric tons of CO2 equivalent
1990	31.350973
1991	35.298122
1992	34.56667
1993	28.441419
1994	26.219968
1995	24.117716
1996	24.497253
1997	23.77419
1998	29.130327
1999	28.198663
2000	28.1908
2001	22.645486
2002	24.103171
2003	26.514457
2004	25.349742
2005	26.300828
2006	25.781686
2007	25.739343
2008	25.130801
2009	25.863259
2010	26.804317
2011	26.220419
2012	27.215922
2013	26.185025
2014	28.104328
2015	28.68263
2016	27.789807
2017	27.135384
2018	27.106761
2019	27.733738
2020	27.377315