Year	% gross
1971	25.9052391052246
1972	39.3647918701172
1973	47.4558181762695
1974	52.952808380127
1975	55.7938995361328
1976	58.9177513122559
1977	65.1269683837891
1978	73.9632720947266
1979	82.4078216552734
1980	85.2534637451172
1981	88.3014297485352
1982	95.299201965332
1983	90.58056640625
1984	91.2077178955078
1985	94.4411773681641
1986	94.0249404907227
1987	96.6483001708984
1988	92.8197479248047
1989	94.8690032958984
1990	95.6223983764648
1991	98.1467132568359
1992	100.808670043945
1993	80.9860382080078
1994	82.6898880004883
1995	82.0657501220703
1996	82.0678100585938
1998	90.010627746582
1999	90.4829711914063
2000	90.9810562133789
2001	88.9390335083008
2002	89.0293807983398
2003	90.605842590332
2004	92.4867935180664
2005	95.0780487060547
2006	95.7722091674805
2007	95.6539611816406
2008	95.3603591918945
2009	96.0601501464844
2010	98.1103973388672
2011	98.2483901977539
2012	99.9622421264648
2013	96.1620178222656
2014	96.7591094970703
2015	96.0615234375
2016	95.3065872192383
2017	95.3609619140625
2018	98.5235900878906
2019	100.307403564453
2020	101.887367248535