Year	% gross
1971	13.537260055542
1972	14.015230178833
1973	14.6542901992798
1974	16.2430992126465
1975	17.4935207366943
1977	28.1840591430664
1978	29.7270698547363
1979	30.4691390991211
1980	31.1804599761963
1981	32.2082786560059
1982	33.1681213378906
1983	33.916259765625
1984	30.8831005096436
1985	31.6562995910645
1986	33.9939804077148
1987	36.5865707397461
1988	39.2844581604004
1989	43.2932891845703
1990	47.6241683959961
1991	53.2028884887695
1992	58.7110710144043
1993	66.8486480712891
1994	70.5693969726562
1995	72.8448028564453
1996	74.4378280639648
1997	77.0840835571289
1998	83.9184875488281
1999	88.3249435424805
2000	90.6489181518555
2001	94.5535278320312
2002	96.0845184326172
2003	96.6120300292969
2004	98.5097808837891
2005	100.717247009277
2006	103.105010986328
2007	105.089508056641
2008	106.329437255859
2009	101.732460021973
2010	102.747123718262
2011	103.083862304688
2012	100.574432373047
2013	100.171516418457
2014	98.6782073974609
2015	98.1866302490234
2016	97.4420166015625
2017	98.7431182861328
2018	100.645790100098
2019	103.75373840332
2020	107.340469360352
2021	112.642509460449
2022	118.473243713379