Year	% gross
1971	64.4778289794922
1972	62.5203895568848
1973	64.9057464599609
1974	70.3299713134766
1975	72.5287094116211
1976	74.7907028198242
1977	74.5781631469727
1978	74.1230621337891
1979	76.0296096801758
1980	77.5591125488281
1981	77.9922180175781
1982	75.1239318847656
1983	74.6579818725586
1984	72.6278381347656
1985	71.5887680053711
1986	68.9229583740234
1987	68.8141937255859
1988	70.3994064331055
1989	72.2169494628906
1990	68.7590026855469
1991	67.4436187744141
1992	58.6936988830566
1993	60.7304496765137
1994	58.4227104187012
1995	60.8052291870117
1996	65.6901626586914
1997	67.8786392211914
1998	64.1546173095703
1999	68.2467269897461
2000	69.9323806762695
2001	70.1575927734375
2002	73.821891784668
2003	78.922721862793
2004	82.2463226318359
2005	84.90966796875
2006	87.1631927490234
2007	85.5178527832031
2008	82.5125732421875
2009	80.6364898681641
2010	80.8387222290039
2011	80.8488388061523
2012	79.9951095581055
2013	79.9205093383789
2014	79.9322891235352
2015	80.1704177856445
2016	77.7352981567383
2017	77.5987930297852
2018	79.7135772705078
2019	83.1148300170898
2020	84.6998977661133