Year	% gross
1971	35.8960113525391
1972	37.4181785583496
1973	38.7397193908691
1974	40.2797698974609
1975	42.0751304626465
1976	45.464469909668
1977	48.2354583740234
1978	51.1738700866699
1979	54.1411285400391
1980	56.6830596923828
1981	59.2127990722656
1982	62.1586418151855
1983	64.8949584960938
1984	64.2496109008789
1985	58.5020904541016
1986	57.965259552002
1987	55.9465713500977
1988	54.1076011657715
1989	51.8820991516113
1990	52.8338508605957
1991	50.8399887084961
1992	52.6408615112305
1993	55.7383308410645
1994	59.3167610168457
1995	62.9527893066406
1996	66.1273880004883
1997	68.5639495849609
1998	71.970458984375
1999	78.5717010498047
2000	85.2468185424805
2001	91.3268966674805
2002	97.5276489257812
2003	100.94319152832
2004	101.445266723633
2005	101.164581298828
2006	100.194549560547
2007	101.253036499023
2008	100.674911499023
2009	101.13655090332
2010	104.522972106934
2011	106.470497131348
2012	106.836860656738
2013	106.541313171387
2014	105.984893798828
2015	104.70947265625
2016	105.078002929688
2017	106.399780273438
2018	107.788192749023
2019	109.313812255859
2020	110.699081420898
2021	110.236251831055
2022	112.630439758301