Year	% gross
1970	27.5149002075195
1971	27.4815006256104
1972	27.9961795806885
1973	28.4011001586914
1974	28.5521106719971
1975	29.0346603393555
1976	29.2884902954102
1977	29.6015605926514
1978	30.2461891174316
1979	31.4793701171875
1980	32.495361328125
1981	33.4622993469238
1982	34.6430015563965
1983	36.419319152832
1984	37.7774391174316
1985	37.0254096984863
1986	35.794059753418
1987	35.6155014038086
1988	35.2997207641602
1989	34.7523384094238
1990	33.7564315795898
1991	33.7896690368652
1992	33.2275199890137
1993	32.9030914306641
1994	33.3432884216309
1995	33.3795509338379
1996	33.4443016052246
1997	33.615478515625
1998	34.1011199951172
1999	34.2291984558105
2000	35.5465698242188
2001	37.213321685791
2002	38.3864898681641
2003	39.685661315918
2004	41.4445495605469
2005	41.6373901367188
2006	42.5367698669434
2007	42.7066307067871
2008	44.4485015869141
2009	45.8970603942871
2010	47.4792404174805
2011	48.3066711425781
2012	49.0199508666992
2013	50.5246696472168
2014	48.689380645752
2015	48.5237083435059
2016	47.9059982299805
2017	48.2849311828613
2018	48.6187705993652
2019	48.9359893798828
2020	49.3522186279297
2021	49.8282508850098
2022	49.6439895629883