Year	% of total fuel combustion
1971	14.532871972318336
1972	16.363636363636367
1973	32.31850117096019
1974	40.99009900990099
1975	40.91778202676864
1976	38.38028169014085
1977	34.60317460317461
1978	32.78443113772455
1979	31.512605042016805
1980	28.31491712707182
1981	29.896907216494846
1982	32.55528255528255
1983	30.49645390070922
1984	0
1985	0
1986	0.2047082906857728
1987	0.2079002079002079
1988	0.19762845849802374
1989	0.29239766081871343
1990	0.2808988764044944
1991	0.2918287937743191
1992	0.24630541871921183
1993	0.2313030069390902
1994	0.2259036144578313
1995	0.29739776951672864
1996	0.35486160397445
1997	0.48814504881450493
1998	0.4539559014267186
1999	0.5198180636777128
2000	0.5050505050505051
2001	0.7951070336391437
2002	0.7562536358347877
2003	0.6703910614525139
2004	0.7874015748031495
2005	0.8268482490272375
2006	0.8501118568232663
2007	0.9186351706036745
2008	0.9752133279154815
2009	1.185124642419289
2010	2.8191072826938135
2011	3.08955807587016
2012	1.6481410502108087
2013	6.223479490806223
2014	7.275176827214551