Year	% gross
1971	86.3582229614258
1972	88.7505569458008
1973	90.8646621704102
1974	92.6427230834961
1975	92.7221908569336
1976	93.0349426269531
1977	93.7844161987305
1978	94.9804611206055
1979	96.7970733642578
1980	98.8223037719727
1981	99.6967620849609
1982	99.0772705078125
1983	98.3165588378906
1984	97.3729629516602
1985	96.9411392211914
1986	96.9146194458008
1987	97.0519332885742
1988	97.1005935668945
1989	96.9736785888672
1990	95.2117233276367
1991	90.0316162109375
1992	88.9297103881836
1993	87.5496826171875
1994	87.9646301269531
1995	89.2205581665039
1996	91.0019989013672
1997	90.4970092773438
1998	82.3129119873047
2008	116.762878417969
2009	114.908042907715
2010	111.078163146973
2011	107.989326477051
2012	105.305328369141
2013	100.995376586914
2014	98.9817123413086
2015	97.5203323364258
2016	97.0480880737305
2017	96.0117721557617
2018	95.4997177124023
2019	94.9205322265625
2020	95.0074691772461
2021	95.2133865356445
2022	94.5358963012695