Year	% gross
1971	67.9719772338867
1972	71.6562118530273
1973	74.74609375
1974	77.75048828125
1975	79.7963714599609
1976	84.3118286132812
1977	86.4114227294922
1978	88.4275283813477
1979	89.0524597167969
1980	90.6211624145508
1981	91.806640625
1982	93.4166717529297
1983	95.9676208496094
1984	98.6091918945312
1985	99.1850814819336
1986	113.233993530273
1987	115.026962280273
1988	115.522277832031
1989	117.310546875
1990	118.930648803711
1991	120.037437438965
1992	120.808891296387
1993	122.125869750977
1994	135.33561706543
1995	134.226547241211
1996	131.552764892578
1997	126.753799438477
1998	124.688621520996
1999	120.526580810547
2000	120.941116333008
2001	121.740753173828
2002	119.29337310791
2003	119.250862121582
2004	116.085929870605
2005	116.514122009277
2006	117.278106689453
2007	118.606109619141
2008	120.38207244873
2009	121.743392944336
2010	123.655319213867
2011	128.919281005859
2012	110.343353271484
2015	114.759147644043
2016	113.61457824707
2017	115.796371459961
2018	114.827590942383
2019	115.097122192383
2020	115.976219177246
2021	115.847389221191