Year	% gross
1971	52.8671913146973
1972	58.3973388671875
1973	61.047981262207
1974	62.7186317443848
1975	70.6854400634766
1976	76.4131927490234
1977	80.4206085205078
1978	83.4970321655273
1982	82.1270294189453
1983	85.3976593017578
1984	89.9801483154297
1985	91.7591018676758
1986	93.6101531982422
1987	94.0914688110352
1988	96.4539794921875
1989	97.8225784301758
1990	100.113693237305
1991	102.643173217773
1992	104.443901062012
1993	104.16480255127
1994	103.42993927002
1995	102.457160949707
1996	101.866630554199
1997	100.066528320312
1998	100.095710754395
1999	98.743782043457
2000	98.1127090454102
2001	99.6094207763672
2002	100.682319641113
2003	102.783508300781
2004	105.924011230469
2005	106.968627929688
2006	108.706680297852
2007	108.754699707031
2008	108.195602416992
2009	107.639091491699
2010	106.088989257812
2011	106.010581970215
2012	106.116256713867
2013	121.579597473145
2014	114.501289367676
2015	112.040901184082
2016	111.153717041016
2017	109.916831970215
2019	108.618621826172
2020	107.224487304688