Year	% gross
1970	8.03285980224609
1971	8.12534046173096
1972	8.35155010223389
1973	8.49252986907959
1974	8.84208011627197
1975	9.17922019958496
1976	9.57668018341064
1977	10.0638103485107
1978	10.3498201370239
1979	10.788519859314
1980	11.2653398513794
1981	11.8208103179932
1982	11.9418001174927
1983	12.7584800720215
1984	13.0835103988647
1985	13.5961799621582
1986	14.3652000427246
1987	14.7919797897339
1988	15.3941402435303
1989	15.0051803588867
1990	14.5190896987915
1991	14.5847797393799
1992	14.2836599349976
1993	14.1542701721191
1994	14.7453498840332
1995	14.7412300109863
1996	14.6134395599365
1997	10.546950340271
1998	13.3912897109985
1999	15.4785604476929
2000	17.6574401855469
2001	19.1634407043457
2002	19.3622398376465
2003	21.0584602355957
2004	23.7168807983398
2005	26.5431308746338
2006	30.4237098693848
2007	33.470401763916
2008	36.4367218017578
2009	38.4185905456543
2010	41.442741394043
2011	45.0113792419434
2012	47.0148086547852
2013	49.7689590454102
2014	51.3827705383301
2015	53.7822418212891
2016	56.2337684631348
2017	59.7367782592773
2018	60.4895210266113
2019	62.6057815551758
2020	62.4233894348145