Year	% gross
1970	11.2675800323486
1971	11.3594398498535
1972	11.7264699935913
1973	11.9647703170776
1974	12.1162395477295
1975	12.6791896820068
1976	13.2070398330688
1977	13.9062995910645
1978	14.5664501190186
1979	15.2732000350952
1980	16.0899391174316
1981	16.8427200317383
1982	17.2674007415771
1983	17.7157802581787
1984	17.8956699371338
1985	17.8241806030273
1986	17.7743701934814
1987	17.852560043335
1988	18.2653102874756
1989	17.9801292419434
1990	17.9155807495117
1991	18.1296901702881
1992	17.9494495391846
1993	17.94407081604
1994	18.2890701293945
1995	18.7557697296143
1996	18.8408107757568
1997	18.9638595581055
1998	19.7172298431396
1999	20.3991394042969
2000	20.9849491119385
2001	22.085319519043
2002	22.9662208557129
2003	23.8664493560791
2004	25.2656307220459
2005	26.6193695068359
2006	28.3498001098633
2007	30.0334701538086
2008	32.0883483886719
2009	33.8028106689453
2010	35.5300407409668
2011	36.8020706176758
2012	37.9452590942383
2013	39.0079002380371
2014	39.3922996520996
2015	39.5827903747559
2016	40.0080718994141
2017	40.3522415161133
2018	40.8918190002441
2019	41.032958984375
2020	41.360050201416
2021	41.4793815612793
2022	41.2235717773438