Year	% gross
1970	5.03881978988647
1971	5.45454978942871
1972	5.61210012435913
1973	5.81093978881836
1974	6.57894992828369
1975	8.07721996307373
1976	9.04633045196533
1977	10.4989404678345
1978	10.8006401062012
1980	10.6285200119019
1981	10.2713804244995
1983	10.8175001144409
1991	16.4485092163086
1999	28.2188491821289
2000	36.2502517700195
2001	32.6520118713379
2002	36.1675491333008
2003	34.1657104492188
2004	36.4423789978027
2010	53.3714790344238
2015	53.162281036377
2020	57.3245086669922
2021	59.3230285644531
2022	76.4219970703125