Year	% gross
1971	92.2159194946289
1972	92.6051788330078
1973	93.2952194213867
1974	94.590461730957
1975	95.2299728393555
1976	91.513542175293
1977	93.1807403564453
1978	92.2221374511719
1979	89.9894485473633
1980	89.1855163574219
1981	87.9352188110352
1982	88.1275100708008
1983	89.3317184448242
1984	90.3067169189453
1985	91.8832397460938
1986	96.9867401123047
1987	99.694938659668
1988	102.71070098877
1989	104.381439208984
1990	101.307708740234
1991	99.5987319946289
1992	97.4128189086914
1993	95.428596496582
1994	92.7350311279297
1995	94.2818603515625
1996	94.9162673950195
1997	93.8014984130859
1998	93.3586883544922
1999	81.1454010009766
2000	80.7572326660156
2001	81.8773422241211
2002	84.8635177612305
2003	89.0575714111328
2004	92.1414031982422
2005	93.1069793701172
2006	94.0769729614258
2007	94.8931427001953
2008	93.7884368896484
2009	93.9993133544922
2010	96.0774688720703
2011	98.6399078369141
2012	97.4424667358398
2013	103.576080322266
2014	104.772232055664
2015	101.609428405762
2016	98.8317413330078
2017	97.1927185058594
2018	97.0417861938477
2019	94.4127883911133
2020	92.2158889770508
2021	90.9856796264648