Year	% gross
1971	98.1437072753906
1972	97.2941207885742
1973	97.6218109130859
1974	97.0183486938477
1975	98.3777465820312
1976	97.803466796875
1977	98.3441772460938
1978	98.9634094238281
1979	98.0852432250977
1980	98.2085723876953
1981	99.0157470703125
1982	99.0019989013672
1983	99.8662185668945
1984	97.7837524414062
1985	98.6301422119141
1986	97.9181137084961
1987	101.112762451172
1988	98.8488082885742
1989	99.7635879516602
1990	99.271842956543
1991	99.1816711425781
1992	99.2555770874023
1993	100.591720581055
1994	100.517242431641
1996	96.6751937866211
1997	96.614372253418
2000	92.3133773803711
2004	95.065788269043
2008	93.2424392700195
2009	91.9108963012695
2010	92.8739700317383
2011	92.6496734619141
2012	95.451789855957
2013	92.2519989013672
2014	91.5240020751953
2015	94.1520004272461
2018	97.1951904296875
2019	97.3498229980469
2020	96.2762832641602
2021	97.375
2022	97.7879028320312