Year	% of total fuel combustion
2000	0.5870841487279843
2001	0.7716049382716047
2002	0.7751937984496122
2003	0.5899705014749264
2004	0.43795620437956223
2005	0.601503759398496
2006	0.5961251862891205
2007	0.42613636363636326
2008	0.39577836411609535
2009	0.35671819262782367
2010	0.34443168771526944
2011	0.3480278422273782
2012	0.4920049200492005
2013	1.083032490974729
2014	0.5405405405405407