Year	% gross
1971	34.0399017333984
1972	31.7348098754883
1973	31.6464900970459
1974	30.925910949707
1975	30.8515701293945
1976	36.5777816772461
1977	35.2106399536133
1978	37.5737113952637
1979	41.5144691467285
1980	45.9770088195801
1981	51.3548393249512
1982	56.3592185974121
1983	63.1917495727539
1984	66.7927093505859
1985	71.9518508911133
1986	77.1259689331055
1987	70.1243515014648
1988	70.8852005004883
1989	71.9211196899414
1990	74.3616333007812
1991	75.9547805786133
1992	77.6330871582031
1993	86.7474365234375
1994	89.439826965332
1995	91.9361877441406
1996	92.7071762084961
1998	89.3751373291016
1999	87.1193695068359
2000	90.0309524536133
2001	87.8413467407227
2002	87.4843902587891
2003	88.7019805908203
2004	90.0552520751953
2005	90.0544815063477
2006	91.3522491455078
2007	91.991569519043
2008	97.6288604736328
2009	97.2014999389648
2010	98.1501770019531
2011	96.4676895141602
2012	98.6139831542969
2013	97.3663787841797
2014	99.3877182006836
2015	101.946830749512
2016	97.9394073486328
2017	102.306419372559
2018	102.445457458496
2019	107.072868347168
2020	107.666152954102