Year	% gross
1971	40.7347183227539
1972	40.7480583190918
1973	43.3974609375
1974	46.9658699035645
1975	54.0050010681152
1976	56.7307891845703
1977	56.37548828125
1978	53.895881652832
1980	52.8765182495117
1981	55.654670715332
1982	54.9518508911133
1983	56.0262489318848
1984	56.0324516296387
1985	57.475399017334
1986	57.8376617431641
1987	58.2615509033203
1988	59.0449485778809
1989	59.8694190979004
1990	62.358829498291
1991	61.2222518920898
1992	62.4943008422852
1993	61.7562408447266
1994	62.7655487060547
1995	64.1009902954102
1996	64.5792007446289
2018	49.2148895263672
2020	49.2616806030273