Year	thousand metric tons of CO2 equivalent
1990	69.5
1991	72.25
1992	78.7
1993	78.75
1994	79.7
1995	82.15
1996	82.5
1997	47.65
1998	39.6
1999	40.35
2000	45.1
2001	53.6
2002	62.2
2003	68.8
2004	109.6
2005	129.9
2006	150.340501
2007	136.081001
2008	128.421502
2009	114.962003
2010	120.102503
2011	109.418026
2012	104.133549
2013	104.149072
2014	97.164595
2015	96.380117
2016	76.970866
2017	73.961614
2018	72.252363
2019	72.943112
2020	67.43386