Year	% of energy use
1971	-227.3219494188089
1972	-261.62519310728317
1973	-281.42633036049773
1974	-299.17679072551067
1975	-224.28100581812566
1976	-246.8502401283871
1977	-234.37076787625224
1978	-199.01784281123568
1979	-233.8975483556123
1980	-196.52344231937906
1981	-125.50375462644392
1982	-103.30280245982995
1983	-95.67178915025212
1984	-111.66083179959045
1985	-117.38581968331658
1986	-114.16805225755225
1987	-98.94223958884977
1988	-106.86696716045647
1989	-123.82323331390681
1990	-120.24735341267083
1991	-119.05670701325246
1992	-117.89298552564307
1993	-118.23920334964689
1994	-125.43434976452221
1995	-123.37145824436337
1996	-130.55146272745765
1997	-137.66649661371355
1998	-130.86551637752882
1999	-121.05659057045675
2000	-130.05006171071523
2001	-130.01612061616524
2002	-106.17722440209319
2003	-118.858824208556
2004	-126.55166390238941
2005	-121.79880727997747
2006	-119.6605531847611
2007	-114.75249353141433
2008	-104.99188076766582
2009	-102.34625173433982
2010	-111.90134717933739
2011	-104.38866797354669
2012	-99.14236452008008
2013	-90.57835291760162
2014	-93.02721929253659