Year	% gross
1970	0
1971	0
1972	0.376980006694794
1973	0.432920008897781
1974	0.473949998617172
1975	0.711979985237122
1976	0.742240011692047
1977	0.817409992218018
1978	0.939520001411438
1979	1.00104999542236
1980	1.19220995903015
1981	1.24346995353699
1982	1.38364994525909
1983	1.45615994930267
1984	1.65828001499176
1985	1.82940995693207
1986	2.16305994987488
1987	2.39398002624512
1991	4.14524984359741
1993	4.95660018920898
1994	5.40506982803345
1995	5.060959815979
1996	5.39335012435913
1998	5.71330976486206
1999	6.02573013305664
2000	6.76557016372681
2001	7.30689001083374
2002	7.6390700340271
2003	8.87353992462158
2004	9.35762023925781
2005	9.04421997070312
2006	9.87771987915039
2007	10.0200796127319
2008	13.9393796920776
2009	21.4034805297852
2010	18.9607105255127
2011	16.9406700134277
2012	20.8391494750977
2013	25.6314506530762
2014	24.6215991973877
2015	27.1673908233643
2016	23.2882499694824
2017	22.4400691986084
2019	22.9742908477783
2020	24.0127906799316
2021	22.9046497344971