Year	% of total energy use
1990	0
1991	0
1992	0.0006358513369127288
1993	0.0007875812822503731
1994	0.008379296414542563
1995	0.028474446132989537
1996	0.01760900417338076
1997	0.019660591757213117
1998	0.026854621449906226
1999	0.04089174882651781
2000	0.029916275967951076
2001	0.03236504444850374
2002	0.024902298751771447
2003	0.03419617610059994
2004	0.04207594196057792
2005	0.11485216744511653
2006	0.146564186886771
2007	0.1290488549355342
2008	0.20272760908332244
2009	0.3394576205890525
2010	0.2965890252129447
2011	0.34911915342876954
2012	0.46162704479949634
2013	0.47377006000523836
2014	0.617871228736628
2015	0.9332367632531415