Year	% gross
1971	9.11186981201172
1972	8.58051013946533
1973	8.17444038391113
1974	8.22362041473389
1975	8.80519962310791
1976	9.49668979644775
1977	10.3976001739502
1978	11.1063299179077
1979	12.1039695739746
1980	12.8690004348755
1981	13.6685104370117
1982	13.8586597442627
1983	13.314359664917
1984	12.8779602050781
1985	12.5304498672485
1986	12.1828298568726
1987	10.4006099700928
1988	9.14774990081787
1989	8.52952003479004
1990	8.2301197052002
1991	9.21872043609619
1992	10.923999786377
1993	12.7989902496338
1994	13.7445602416992
1995	14.0518102645874
1996	18.2380599975586
1997	19.0278091430664
1998	19.1809196472168
1999	21.9883594512939
2000	23.2870101928711
2001	28.0544300079346
2002	33.7016906738281
2003	38.9063987731934
2004	41.7997398376465
2005	45.4637298583984
2006	54.1389312744141
2007	60.2831192016602
2008	73.4470672607422
2009	81.5331497192383
2010	75.2290267944336
2011	66.7865829467773
2012	54.9534912109375
2013	51.3826103210449
2014	51.0953598022461
2015	49.3568992614746
2016	49.911319732666
2017	50.5108184814453
2018	51.9943504333496
2019	52.439380645752
2020	53.4787902832031
2021	55.2656097412109