Year	% of total energy use
1971	0
1972	0
1973	0
1974	0
1975	0
1976	0
1977	0
1978	0
1979	0
1980	0
1981	0
1982	0
1983	0
1984	0
1985	0
1986	0
1987	0
1988	0
1989	0
1990	0
1991	0
1992	0
1993	0
1994	0
1995	0
1996	0
1997	0
1998	0
1999	0
2000	0
2001	0
2002	0
2003	0
2004	0
2005	0
2006	0.0006777497320651523
2007	0.0006335494657279687
2008	0.0006637093335656255
2009	0.0006270006133013717
2010	0.06393344504225358
2011	0.05023368003335518
2012	0.06091605377377858
2013	0.06371572904042459
2014	0.07046875126135306