Year	% of energy use
1971	-420.1288982427368
1972	-382.0081345232011
1973	-399.89997202114057
1974	-339.2396009154799
1975	-292.6956773482951
1976	-311.3987900097489
1977	-295.7842392647974
1978	-275.30879787825785
1979	-312.17687633897344
1980	-248.9148948059262
1981	-149.1694075389113
1982	-134.0841065062469
1983	-118.65404807548244
1984	-130.0074358549841
1985	-128.072303214492
1986	-133.19368249390533
1987	-138.12750895805266
1988	-160.69054117899375
1989	-165.3150315988881
1990	-135.95302818655023
1991	-110.95702049689865
1992	-108.73990051255518
1993	-112.89265995297701
1994	-111.92010477672609
1995	-117.92684117137634
1996	-125.9876314734595
1997	-138.38451526157516
1998	-153.3338426442266
1999	-155.84789176480044
2000	-158.78314990366042
2001	-150.7649640758341
2002	-132.76195030595787
2003	-122.7038407633038
2004	-138.6974913932636
2005	-136.50872976419254
2006	-137.5529987733481
2007	-137.29620622394825
2008	-130.15555239243076
2009	-126.63157381049894
2010	-124.31677163619779
2011	-111.31414255258908
2012	-110.15781129154037
2013	-100.23658739991126
2014	-83.52539599527643