Year	% gross
1971	8.29277992248535
1972	8.27694988250732
1973	8.160400390625
1974	8.44143009185791
1975	9.90775966644287
1976	11.6376800537109
1977	14.2069997787476
1978	12.5109195709229
1979	12.1260900497437
1980	11.7075500488281
1981	11.6909599304199
1982	11.6031303405762
1983	11.902440071106
1984	11.0657901763916
1985	12.9152202606201
1986	11.7872200012207
1987	15.5571804046631
1991	20.2723293304443
1992	18.3767395019531
1993	26.2689208984375
1994	28.5701999664307
1995	31.052640914917
1996	33.2414283752441
1998	38.2250709533691
1999	39.8226318359375
2015	56.9030303955078
2016	58.4491310119629
2017	58.9169502258301
2018	59.4511795043945
2019	60.0233497619629
2020	61.7095489501953
2021	65.6269836425781