Year	% gross
1970	0.713900029659271
1971	1.05807995796204
1972	1.29405999183655
1973	1.59381997585297
1974	2.06940007209778
1975	2.70867991447449
1980	2.29831004142761
1981	2.39314007759094
1982	2.66364002227783
1984	2.49067997932434
1985	2.95617008209229
1986	2.8372700214386
1989	4.63503980636597
1991	10.7384395599365
2003	14.6147603988647
2004	14.5030603408813
2005	14.4126501083374
2019	50.558910369873