Year	% gross
1971	51.069450378418
1972	48.7216186523438
1973	46.8061790466309
1974	48.5074081420898
1975	52.034740447998
1976	54.493278503418
1977	65.759407043457
1978	65.9682388305664
1979	59.0860710144043
1980	54.8326187133789
1981	58.2376403808594
1982	62.4263381958008
1983	66.016960144043
1984	67.3413696289063
1985	75.2305679321289
1986	78.3001098632813
1987	80.2736663818359
1988	94.3910522460938
1989	94.1247711181641
1990	90.0413818359375
1991	101.33479309082
1992	87.0008697509766
1993	92.2744598388672
1994	91.8216171264648
1995	87.7815704345703
1996	93.2658920288086
1997	87.7057571411133
1998	90.9106674194336
1999	109.498466491699
2000	107.929252624512
2001	109.359748840332
2002	107.483818054199
2003	107.483261108398
2004	107.156288146973
2005	105.590682983398
2006	107.41584777832
2007	108.450622558594
2008	109.985443115234
2009	105.64045715332
2010	101.891006469727
2011	104.473876953125
2013	92.4650802612305
2014	98.7493667602539
2015	101.401466369629
2016	102.44750213623
2017	100.611701965332
2018	98.2353210449219
2019	97.2290878295898
2020	97.2242431640625
2021	99.6210021972656