Year	% of energy use
1971	-136.78991717972718
1972	-153.6933085264227
1973	-182.75727917480089
1974	-187.0753669147877
1975	-176.52549895484356
1976	-173.97439051759656
1977	-166.83001668700655
1978	-130.49093969197807
1979	-145.52095759176495
1980	-147.6534919462983
1981	-124.34030811420529
1982	-129.5369349357851
1983	-177.16271231136412
1984	-203.6955976500395
1985	-215.48705746369086
1986	-263.269770887141
1987	-331.78355004649313
1988	-403.0892525293759
1989	-394.3952327647593
1990	-387.01802229959566
1991	-397.266037863952
1992	-440.7185446856883
1993	-386.7243532810472
1994	-418.09319254097375
1995	-472.40650784965334
1996	-507.33401838065896
1997	-520.2321647017513
1998	-542.3707081144169
1999	-519.3524059487314
2000	-504.1590017572443
2001	-475.11125528034626
2002	-550.7141853013338
2003	-501.43665594339285
2004	-555.8095354098947
2005	-735.864294703601
2006	-759.6287888236416
2007	-858.1888153033718
2008	-885.2459408037708
2009	-764.5494214828725
2010	-703.7723814435319
2011	-619.0538945912813
2012	-589.5061313570089
2013	-594.5461428673585
2014	-540.9974712296487