Year	% of total energy use
2000	0.2301543730395854
2001	0.18822916020306318
2002	0.1891127294619658
2003	0.1808528813953815
2004	0.35817672571823356
2005	0.36169601508098886
2006	0.3386941325936391
2007	0.3038038430670196
2008	0.242909114218788
2009	0.342892770845777
2010	0.4393427720436426
2011	0.29190683510895005
2012	0.2734545394656829
2013	0.3835204842325386
2014	0.5191763785084782