Year	% gross
1981	51.7920417785645
1986	64.7548980712891
1989	66.6766967773438
1990	61.5710906982422
1991	58.3188705444336
1992	48.6460494995117
1993	40.0962905883789
1994	30.616849899292
1995	33.8525505065918
1996	37.4569396972656
1997	40.4817810058594
1998	45.8908500671387
1999	52.3168106079102
2000	56.5758094787598
2001	56.2627906799316
2002	58.7299194335938
2003	61.9177703857422
2004	62.854679107666
2005	65.4439926147461
2006	71.2251129150391
2007	73.1658630371094
2008	76.5368804931641
2009	79.4316482543945
2010	78.8080673217773
2011	79.4697723388672
2012	80.2534103393555
2013	82.0543212890625
2014	84.9172592163086
2015	86.2964935302734
2016	87.1863174438477
2017	88.1883926391602
2018	88.3402099609375
2019	88.8318328857422
2020	89.1377716064453