Year	% gross
1970	48.6313285827637
1972	57.3045997619629
1973	59.988410949707
1974	63.7988586425781
1975	66.3235092163086
1976	69.2740097045898
1977	71.0682220458984
1978	72.5729217529297
1980	71.5737533569336
1981	69.9132614135742
1983	70.0199279785156
1984	68.985221862793
1985	67.2593536376953
1986	69.2151718139648
1987	71.5162963867188
1991	71.0453033447266
1992	76.8989868164062
1998	77.8496780395508
1999	78.7294311523438
2000	77.8105316162109
2001	76.3461685180664
2002	78.1007308959961
2003	79.5298309326172
2004	82.1039276123047
2006	82.5562515258789
2007	82.9250335693359
2008	81.5703887939453
2009	82.6658935546875
2011	87.1103515625
2012	86.1176223754883
2014	90.2099990844727
2015	90.0500030517578
2016	91.1829986572266
2018	93.1989974975586
2019	63.4449996948242
2020	92.7099990844727
2021	93.8460006713867
2022	80.5500030517578