Year	% gross
1970	24.5422592163086
1971	26.4407901763916
1972	27.9578895568848
1973	34.245288848877
1974	36.7342910766602
1975	38.058650970459
1976	39.2242813110352
1977	41.6619606018066
1978	41.4108009338379
1979	42.3369293212891
1980	43.0250396728516
1981	43.6944198608398
1982	44.8497314453125
1983	44.8755798339844
1984	46.7219886779785
1985	47.8662300109863
1986	52.8278884887695
1987	53.8516387939453
1988	54.5495491027832
1989	55.0196914672852
1991	55.3628883361816
1992	61.3745498657227
1993	63.4184913635254
1994	64.6283111572266
1995	65.5412826538086
1996	69.4660263061523
1998	74.0524291992188
1999	74.1051025390625
2000	76.4044799804688
2002	78.1551971435547
2004	82.9504623413086
2005	86.9616470336914
2006	90.2876663208008
2007	93.012809753418
2008	94.2315521240234
2009	98.2700805664062
2010	99.9543685913086
2011	101.20581817627
2012	97.2326889038086
2013	98.1015014648438
2014	97.3632888793945
2015	97.6741180419922
2016	98.4156265258789
2017	99.2193298339844
2018	100.373336791992
2019	101.989349365234
2020	101.499450683594
2021	102.987998962402
2022	101.573776245117