Year	thousand metric tons of CO2 equivalent
1990	55422.855
1991	55007.9475
1992	54067.18
1993	55218.74
1994	55068.2975
1995	54379.58
1996	52835.7875
1997	53409.485
1998	54071.28
1999	52652.825
2000	53153.8125
2001	53211.8275
2002	54477.3575
2003	54833.2575
2004	54244.635
2005	54256.1325
2006	54316.425
2007	54832.555
2008	55349.595
2009	56129.5125
2010	56474.9425
2011	57458.07
2012	55607.145
2013	56361.5375
2014	56896.1825
2015	57825.6675
2016	58416.9375
2017	59360.3675
2018	60004.5325
2019	60708.5175
2020	61272.0425