Year	% gross
1970	9.4098596572876
1971	9.91361999511719
1972	10.7021703720093
1973	11.3513898849487
1974	11.9776296615601
1975	12.9515399932861
1976	13.6789197921753
1977	14.1072301864624
1978	15.060040473938
1979	15.4575996398926
1980	16.1184406280518
1981	16.4055309295654
1982	17.0219497680664
1983	17.8697109222412
1984	18.4834403991699
1985	17.9281692504883
1986	19.5774898529053
1987	21.0026798248291
1988	22.1915798187256
1989	23.406379699707
1990	24.6053295135498
1991	26.0274906158447
1992	27.4844608306885
1993	28.2869300842285
1994	28.522590637207
1995	30.5464992523193
1996	33.3249092102051
1997	32.3256683349609
1998	33.9409103393555
1999	34.1597785949707
2000	32.2335395812988
2001	33.8815002441406
2002	36.2148208618164
2003	40.6279487609863
2004	44.2705688476563
2005	47.4548606872559
2006	50.1655807495117
2007	50.9296188354492
2008	53.1919212341309
2009	55.7442092895508
2010	59.0705299377441
2011	59.5750312805176
2012	57.8828811645508
2013	58.54833984375
2014	60.0112800598145
2015	60.9978713989258
2016	63.9232711791992
2017	67.2422714233398
2018	64.2806167602539
2019	68.5545806884766
2020	66.5127868652344