Year	% gross
1970	0.236829996109009
1972	0.27208998799324
1973	0.366109997034073
1974	0.304049998521805
1975	0.332480013370514
1976	0.37584000825882
1977	0.618369996547699
1978	0.720000028610229
1979	0.627149999141693
1986	0.662739992141724
1990	1.51288998126984
2003	0.573949992656708
2004	0.577600002288818
2009	1.48238003253937
2011	1.86354005336761
2014	3.45772004127502
2018	5.00381994247437
2020	5.94174003601074