Year	% gross
1974	9.44618034362793
1975	9.8787202835083
1976	11.7232398986816
1977	15.4355001449585
1978	14.0725297927856
1979	14.3329496383667
1980	15.5351896286011
1981	17.0487003326416
1982	17.5346508026123
1983	18.4952697753906
1984	19.4796390533447
1985	20.5711193084717
1986	22.1500606536865
1987	23.8132801055908
1988	24.5965595245361
1989	24.5069808959961
1990	24.4007091522217
1991	24.5135192871094
1992	24.7626991271973
1993	24.8875904083252
1994	24.817850112915
1995	25.3897399902344
1996	25.9818592071533
1997	24.3204803466797
1998	27.8669109344482
1999	28.7402496337891
2000	29.9222393035889
2001	30.7920398712158
2002	30.7380504608154
2003	31.9576396942139
2004	33.8357696533203
2005	35.8890991210938
2006	38.9214096069336
2007	40.8205718994141
2008	42.9719314575195
2009	45.0098915100098
2010	47.6699485778809
2011	51.2760391235352
2012	54.9212684631348
2013	57.3160018920898
2014	57.5744781494141
2015	59.5512886047363
2016	61.6177406311035
2017	63.7023315429688
2018	64.9183502197266
2019	65.8687286376953
2020	65.7499008178711