Year	% gross
1972	3.35155010223389
1973	3.47920989990234
1974	3.95358991622925
1975	4.50153017044067
1976	5.08349990844727
1977	5.54003000259399
1978	6.01219987869263
1979	6.91505002975464
1980	8.07598972320557
1981	9.23180961608887
1982	8.49792003631592
1983	9.42549991607666
1984	10.9629201889038
1985	11.9231395721436
1986	11.4667701721191
1987	12.2289199829102
1988	12.8495197296143
1989	13.4012699127197
1991	13.759880065918
1992	18.6850204467773
1993	20.0434093475342
1994	24.6112899780273
1995	28.2159194946289
1996	35.1725311279297
1998	36.9029197692871
1999	38.5268211364746
2020	85.9283218383789