Year	% gross
1971	79.4125671386719
1972	81.0061492919922
1975	79.9157028198242
1976	81.7977600097656
1977	83.4282836914062
1978	82.8525390625
1979	84.0040283203125
1980	80.4379425048828
1981	85.5093383789062
1982	86.6282577514648
1983	87.147346496582
1984	89.8645477294922
1985	92.7848663330078
1986	93.9906616210938
1987	96.4421234130859
1988	96.0928115844727
1989	96.8754196166992
1990	98.6455307006836
1991	100.238136291504
1992	101.702682495117
1993	102.648292541504
1994	102.015762329102
1995	101.584899902344
1996	102.046760559082
1998	110.188041687012
1999	108.443786621094
2000	109.021507263184
2001	110.139266967773
2002	113.519561767578
2003	116.79273223877
2004	108.134918212891
2005	108.752983093262
2006	107.523468017578
2007	106.327003479004
2008	106.229942321777
2009	106.478248596191
2010	108.819038391113
2011	109.70686340332
2012	113.517669677734
2013	122.033569335938
2014	120.632568359375
2015	119.807357788086
2016	117.122772216797
2017	115.741142272949
2018	114.649406433105
2019	112.034339904785
2020	110.487319946289
2021	115.156303405762