Year	% gross
1970	13.3131303787231
1971	13.4169797897339
1972	13.7763004302979
1973	14.0896396636963
1974	14.2827100753784
1975	14.7863798141479
1976	15.270489692688
1977	15.7559003829956
1978	16.5396003723145
1979	17.4118995666504
1980	18.544469833374
1981	19.7194900512695
1982	21.0669498443604
1983	22.3287696838379
1984	23.496940612793
1985	24.0569801330566
1986	23.7301502227783
1987	23.7350902557373
1988	23.5093593597412
1989	22.7704105377197
1990	22.9844703674316
1991	23.2147102355957
1992	23.0352096557617
1993	23.1402702331543
1994	23.4164791107178
1995	23.9234294891357
1996	24.1364192962646
1997	24.1835403442383
1998	24.7271499633789
1999	24.9992198944092
2000	25.55544090271
2001	26.8567905426025
2002	27.8475799560547
2003	28.9565906524658
2004	30.4827003479004
2005	31.3946495056152
2006	32.4261093139648
2007	33.3570518493652
2008	35.2973098754883
2009	37.0762786865234
2010	38.9942283630371
2011	40.1893501281738
2012	41.4322814941406
2013	44.0434303283691
2014	42.8471603393555
2015	43.3729705810547
2016	42.8520698547363
2017	43.0924301147461
2018	43.278621673584
2019	43.8076782226562
2020	44.3811302185059
2021	44.7835693359375
2022	44.6234092712402