Year	thousand metric tons of CO2 equivalent
1970	12.903527956676475
1971	13.141358047866824
1972	13.94541691545844
1973	14.990350887697945
1974	15.937610071194173
1975	16.501784967881445
1976	13.542465058320794
1977	15.522654286253498
1978	14.414800008594995
1979	15.8271530290723
1980	17.784259177172206
1981	14.201073032748702
1982	18.776181930744595
1983	18.651603228366405
1984	18.245100971162294
1985	18.63033396689891
1986	17.320143331801894
1987	10.986189513015708
1988	19.464031422340895
1989	20.85450561270709
1990	11.009555503725998
1991	7.736501306295402
1992	9.521836429834401
1993	10.881256997585297
1994	29.570419542491408
1995	27.769449234008803
1996	26.941627651453004
1997	24.953216522932095
1998	35.7741227447987
1999	25.0500514879823
2000	16.12519593536851
2001	24.2576295286417
2002	33.58456249535081
2003	32.5770565271378
2004	42.467498645186396
2005	40.98872199654579
2006	38.99752393364909
2007	35.98534502089021
2008	43.8318032473326
2009	53.85754118859771
2010	60.619762212038
2011	58.365552589297295
2012	77.8504370898008
2013	77.7543368712068
2014	65.68091295659539
2015	65.24021242558959
2016	73.815030194819