Year	% gross
1970	53.5107192993164
1971	54.380241394043
1972	55.8554992675781
1973	56.9459190368652
1974	58.9763412475586
1975	60.226131439209
1976	60.8734512329102
1977	61.8809814453125
1978	62.3243789672852
1979	63.0386505126953
1980	63.5849189758301
1981	63.0982513427734
1982	63.8066596984863
1983	63.1567993164062
1984	62.441478729248
1985	60.2822608947754
1986	60.2530212402344
1987	60.9133911132812
1988	61.1029014587402
1989	61.4359512329102
1990	61.6682891845703
1991	62.8784103393555
1992	64.2939910888672
1993	64.4823379516602
1994	63.9694786071777
1995	64.1210098266602
1996	63.760368347168
1997	61.5924987792969
1998	61.0184898376465
1999	61.1756591796875
2000	59.5349311828613
2001	61.0182304382324
2002	63.4998016357422
2003	64.5773620605469
2004	64.9066772460938
2005	64.4552307128906
2006	65.2453231811523
2007	65.7742767333984
2008	66.8955078125
2009	67.4896087646484
2010	70.2826690673828
2011	70.7803726196289
2012	69.1830673217773
2013	69.5376968383789
2014	69.7538223266602
2015	70.2854385375977
2016	70.3699264526367
2017	70.4940032958984
2018	70.6534576416016
2019	70.8331832885742
2020	70.8138809204102
2021	71.2333984375