Year	% gross
1970	41.9375190734863
1971	45.221851348877
1972	49.6452789306641
1973	51.3334693908691
1976	49.7247085571289
1977	60.8963394165039
1978	77.4512634277344
1979	91.1608505249023
1980	96.1790466308594
1981	103.767646789551
1982	113.145721435547
1983	113.028762817383
1984	111.932113647461
1985	105.598083496094
1986	92.1432266235352
1987	88.3635711669922
1988	84.2271575927734
1989	82.075813293457
1990	85.5113983154297
1991	84.6890716552734
1992	89.2756423950195
1993	94.0711898803711
1994	94.4626235961914
1995	90.4266662597656
1996	79.5559692382812
1999	95.1762084960938
2000	99.2021102905273
2001	95.9370880126953
2002	97.0674209594727
2003	98.1725769042969
2004	99.183952331543
2005	99.7802734375
2006	100.187828063965
2007	91.4314422607422
2008	82.380500793457
2009	83.4956970214844
2010	83.0165863037109
2011	88.0855102539062
2012	89.3999862670898
2013	91.3719711303711
2014	87.4456405639648
2015	83.75
2016	81.9161682128906
2017	76.4629974365234
2018	84.6760635375977
2019	83.2570037841797
2020	87.3721008300781
2021	86.7234268188477