Year	thousand metric tons of CO2 equivalent
1970	19.667900757265098
1971	19.957363920831703
1972	20.005770109105093
1973	19.716685103678703
1974	18.926185074615503
1975	15.4293338317513
1976	30.51326940751079
1977	36.40090408301351
1978	95.208587667227
1979	121.030567683697
1980	114.67515212941198
1981	191.58904174995394
1982	204.14551942777607
1983	239.22860478329693
1984	246.72678036546696
1985	219.77269175529503
1986	127.878601610184
1987	143.94111448693292