Year	% gross
1971	84.2659225463867
1972	86.9704437255859
1973	92.0975875854492
1974	96.8209915161133
1975	99.4798736572266
1976	101.322776794434
1977	103.391311645508
1978	104.079536437988
1979	106.162246704102
1980	107.998558044434
1981	106.230262756348
1982	104.868621826172
1983	102.509887695312
1984	101.510963439941
1985	102.386817932129
1986	101.480339050293
1987	100.313552856445
1988	102.999336242676
1989	98.6522827148438
1990	96.9368591308594
1991	98.8953323364258
1992	101.977500915527
1993	101.887092590332
1994	100.158309936523
1995	97.6923828125
1996	96.7077331542969
1998	93.4128494262695
1999	93.1984024047852
2000	92.8326568603516
2002	92.3663711547852
2003	92.1416625976562
2004	91.70556640625
2005	90.9360733032227
2006	91.0296630859375
2007	83.9564819335938
2008	84.9496078491211
2010	85.066276550293
2011	85.8349380493164
2012	85.868522644043
2013	89.9209365844727
2014	87.3037033081055