Year	% gross
1971	7.02642011642456
1972	7.30150985717773
1973	7.44246006011963
1974	7.52127981185913
1975	7.81883001327515
1976	8.77939033508301
1977	8.85692024230957
1978	9.35772037506104
1979	10.4358596801758
1980	12.3588104248047
1981	14.783390045166
1982	18.8228797912598
1983	23.4447193145752
1984	27.5428199768066
1985	31.2666606903076
1986	34.4731292724609
1987	35.6251106262207
1988	35.2998313903809
1989	34.7567405700684
1990	34.9929618835449
1991	35.7576217651367
1992	37.766040802002
1993	41.7373695373535
1994	43.6291694641113
1995	47.9653587341309
1996	53.7457618713379
1997	70.1971588134766
1998	67.2375183105469
1999	71.0881500244141
2000	74.6898574829102
2001	77.3433532714844
2002	80.7160491943359
2003	84.4563903808594
2004	89.8009033203125
2005	95.3700103759766
2006	99.9493103027344
2007	102.949272155762
2008	103.136177062988
2009	102.658447265625
2010	101.673286437988
2011	100.819679260254
2012	98.286979675293
2013	96.3375015258789
2014	94.4421691894531
2015	93.9676513671875
2016	93.6577224731445
2017	93.7230224609375
2018	93.3281784057617
2019	93.9989166259766
2020	96.8767700195312
2021	100.317680358887
2022	103.276039123535