Year	% gross
1971	64.7271728515625
1972	65.5158233642578
1973	69.1681823730469
1974	72.741096496582
1975	76.503059387207
1976	80.4608917236328
1977	84.6826934814453
1978	88.5917663574219
1979	83.4961090087891
1980	96.1649475097656
1981	95.4066772460938
1982	98.5170822143555
1983	97.6992416381836
1984	98.2712478637695
1985	96.3895263671875
1986	97.4439697265625
1987	97.9418792724609
1988	97.5499877929688
1989	97.1985778808594
1990	96.6706314086914
1991	96.6183700561523
1992	96.9245681762695
1993	97.2928009033203
1994	97.0022201538086
1995	96.1315307617188
1996	95.2794723510742
1997	96.3528137207031
1998	97.4234008789062
1999	97.0660095214844
2000	96.9824600219727
2001	96.8490600585938
2002	96.6815567016602
2003	96.5353469848633
2004	96.3763885498047
2005	96.2276992797852
2006	96.3363723754883
2007	96.4664688110352
2008	96.6125717163086
2009	96.7243576049805
2010	96.7329788208008
2011	96.8109664916992
2012	97.6127014160156
2013	97.6828002929688
2014	98.7940979003906
2015	99.384033203125
2016	99.6484603881836
2017	99.8448333740234
2018	99.8954086303711
2019	100.201797485352
2020	100.365028381348
2021	102.043838500977
2022	102.261528015137