Year	% gross
1971	30.7708892822266
1972	33.0840682983398
1973	35.4452514648438
1974	38.8049011230469
1975	41.7945404052734
1976	45.1273002624512
1977	48.1118392944336
1978	53.4978981018066
1979	58.0868797302246
1980	60.8012886047363
1981	61.7421188354492
1982	62.8905487060547
1983	64.0622329711914
1984	65.8247985839844
1985	68.307243347168
1986	71.987190246582
1987	73.9914627075195
1988	72.8096313476563
1989	71.0542373657227
1990	71.6929473876953
1991	72.3870620727539
1992	73.4250793457031
1993	75.9391174316406
1994	79.0305023193359
1995	79.0943832397461
1996	79.7963104248047
1997	80.6630935668945
1998	80.3219223022461
1999	79.2957077026367
2000	79.919563293457
2001	81.5214309692383
2002	83.6860122680664
2003	86.345458984375
2004	88.6236190795898
2005	89.3392105102539
2006	90.3739624023438
2007	91.5634689331055
2008	94.1791381835938
2009	96.7367172241211
2010	100.965316772461
2011	100.934066772461
2012	104.118377685547
2013	100.457153320313
2014	101.403617858887
2015	101.604843139648
2016	104.451759338379
2017	104.911911010742
2018	103.783340454102
2019	103.156547546387
2020	103.091743469238