Year	% of energy use
1990	8.327272467323615
1991	15.59040540689207
1992	2.806208625005481
1993	1.3439417675324736
1994	-1.05696464651107
1995	-6.029179584116086
1996	-22.574573565961693
1997	-24.662622890667095
1998	-37.80447427799428
1999	-72.76752407615578
2000	-66.50867991663712
2001	-71.19919983384337
2002	-70.96191316319207
2003	-63.246602327592996
2004	-56.92043753859317
2005	-102.97492371503498
2006	-185.40770764494204
2007	-330.69132271724334
2008	-340.4258041979509
2009	-441.15660667922197
2010	-465.4872981678641
2011	-377.3327546186187
2012	-328.95679554440716
2013	-327.6003777125394
2014	-310.3846943892358