Year	% gross
1971	19.9157905578613
1972	20.6412506103516
1973	20.7631607055664
1974	20.9906406402588
1975	22.7705707550049
1976	23.2697296142578
1977	23.4610900878906
1978	23.3553504943848
1979	23.368839263916
1980	22.9178009033203
1981	23.2414093017578
1982	23.3736801147461
1983	23.2913799285889
1984	23.3583393096924
1985	23.2845706939697
1986	23.6595306396484
1987	24.395959854126
1988	25.1213493347168
1989	26.1194801330566
1990	27.6521091461182
1991	30.0100803375244
1992	33.9598503112793
1993	38.43505859375
1994	43.4300918579102
1995	48.9479789733887
1996	51.7504806518555
1997	53.3675804138184
1998	53.4906997680664
1999	55.8593406677246
2000	52.5522613525391
2001	51.908748626709
2002	54.2513198852539
2003	53.616081237793
2004	50.4079399108887
2005	50.139949798584
2006	50.0908393859863
2007	49.9436302185059
2008	48.8149185180664
2009	50.5867691040039
2010	51.5283508300781
2011	51.0654983520508
2012	50.9093589782715
2013	49.2081718444824
2014	49.1914710998535
2015	48.7775611877441
2016	49.763069152832
2017	50.6674118041992
2018	51.7610015869141
2019	55.2570991516113
2020	58.9949188232422
2021	65.4990081787109
2022	69.3536529541016