Year	% gross
1970	8.71199989318848
1971	9.48139953613281
1972	10.2172899246216
1973	10.8546600341797
1974	11.5915203094482
1975	12.6416301727295
1976	13.4510202407837
1977	14.1290502548218
1978	14.4491901397705
1979	15.1748504638672
1980	15.867790222168
1981	15.9715204238892
1982	16.6268692016602
1983	17.4991302490234
1984	18.1950397491455
1985	17.4920806884766
1986	19.0755996704102
1987	20.4397201538086
1988	21.5743007659912
1989	22.7245502471924
1990	23.8565406799316
1991	25.2935791015625
1992	27.1910095214844
1993	27.6923503875732
1994	27.9457702636719
1995	30.3351993560791
1996	32.2259407043457
1997	31.2057991027832
1998	32.1393394470215
1999	32.4841384887695
2000	30.6322002410889
2001	32.4915390014648
2002	34.9581298828125
2003	39.3344688415527
2004	42.8578681945801
2005	46.2962493896484
2006	49.1961288452148
2007	49.7941818237305
2008	52.8176498413086
2009	55.1789894104004
2010	58.1381187438965
2011	59.2378883361816
2012	57.316780090332
2013	57.9573593139648
2014	59.6555099487305
2015	60.8722381591797
2016	63.4650611877441
2017	66.1675186157227
2018	63.0561599731445
2019	67.291259765625
2020	65.9516220092773