Year	% gross
1971	12.6632204055786
1972	12.7928104400635
1976	13.5822496414185
1977	15.686149597168
1978	16.109130859375
1981	24.917179107666
1982	32.7789611816406
1983	39.2052803039551
1984	44.0999908447266
1985	50.0736694335938
1986	55.4344100952148
1987	59.1738815307617
1988	60.8329010009766
1989	61.6238708496094
1990	60.1487312316895
1991	62.3801383972168
1992	62.9781913757324
1993	63.5270881652832
1994	65.5353393554688
1995	67.4947967529297
1996	69.2310409545898
1997	70.7539825439453
1998	72.6865615844727
1999	73.8599090576172
2000	74.7974166870117
2001	75.3911285400391
2002	75.8446426391602
2003	80.6091003417969
2004	83.4727478027344
2005	91.5825881958008
2006	99.8666763305664
2007	106.181762695313
2008	106.087509155273
2009	103.267066955566
2010	102.60466003418
2011	103.764717102051
2012	105.612487792969
2013	71.843879699707
2014	72.5808334350586
2015	72.8638076782227
2016	73.0958862304688
2017	74.7539825439453
2018	73.7824401855469
2019	71.9601287841797
2020	71.4961624145508