Year	% gross
1970	16.5831298828125
1971	16.7040500640869
1972	18.6572303771973
1973	19.9964408874512
1974	21.3161201477051
1975	23.0461196899414
1976	25.1672191619873
1977	27.3553791046143
1978	29.1364803314209
1979	30.5691699981689
1980	31.7106304168701
1981	32.817569732666
1982	34.307991027832
1983	35.456958770752
1984	36.6316986083984
1985	38.011360168457
1986	40.077449798584
1987	41.3904495239258
1988	42.2596282958984
1989	43.6619415283203
1990	47.140380859375
1991	48.1684684753418
1992	48.4764213562012
1993	50.314079284668
1994	53.017879486084
1995	54.0728416442871
1996	54.7109107971191
1997	56.7446212768555
1998	58.9649391174316
1999	61.121898651123
2000	62.660270690918
2001	63.9178085327148
2002	64.9834671020508
2003	66.2743530273438
2004	67.4036636352539
2005	67.2876586914062
2006	67.7269668579102
2007	66.9148178100586
2008	67.3899307250977
2009	68.762321472168
2010	69.4342880249023
2011	72.7057037353516
2012	73.4104309082031
2013	70.8898468017578
2014	71.3835601806641
2015	71.2346878051758
2016	71.4611663818359
2017	71.5513534545898
2018	71.9725112915039
2019	72.5907516479492
2020	73.3763809204102
2021	74.2507171630859
2022	74.8022689819336