Year	% gross
1974	6.29468011856079
1975	6.66129016876221
1976	8.68564987182617
1977	11.3119096755981
1978	10.1010904312134
1979	10.6804504394531
1980	11.6160497665405
1981	14.2235803604126
1982	16.010009765625
1983	17.8180294036865
1984	17.872989654541
1985	23.1621208190918
1986	25.1995697021484
1987	26.6274700164795
1988	26.4877109527588
1989	26.3143100738525
1991	24.9008007049561
1992	27.4076404571533
1993	31.1873397827148
1994	32.7728004455566
1995	36.7929611206055
1996	35.3456802368164
1997	33.4321212768555
1998	35.2840118408203
1999	35.1642608642578
2000	34.0713195800781
2001	33.8207702636719
2002	35.1038589477539
2003	36.6530113220215
2004	39.0892181396484
2005	38.4980888366699
2006	37.7154006958008
2008	43.6631698608398
2009	48.517650604248
2010	50.3012008666992
2011	50.913501739502
2012	51.392578125
2013	54.5381202697754
2014	58.269588470459
2015	56.6305503845215
2016	55.464469909668
2017	54.3044281005859
2018	52.791389465332
2019	49.7577705383301
2020	49.8650703430176