Year	% gross
1978	16.4931201934814
1979	38.0181999206543
1980	40.3249816894531
1981	40.8212890625
1982	41.4919013977051
1983	42.0418701171875
1984	42.8015098571777
1986	42.462230682373
1987	47.0281715393066
1988	47.6986999511719
1989	44.8811302185059
1991	45.7516288757324
1992	47.9675598144531
1993	57.1833610534668
1994	50.9908294677734
1995	51.9764785766602
1996	53.9834785461426
1997	55.2012786865234
1998	52.2535209655762
1999	53.2093505859375
2000	47.6042709350586
2001	47.2459297180176
2002	52.8193702697754
2003	52.349781036377
2004	56.3804588317871
2005	57.851318359375
2006	56.9028015136719
2007	58.845760345459
2008	60.5369491577148
2009	66.5970764160156
2010	66.712158203125
2011	68.9825210571289
2012	69.8160705566406
2013	71.1747741699219
2014	71.225227355957
2015	70.1284713745117
2016	69.5271835327148
2017	68.4352493286133
2018	65.0275344848633
2019	63.6700820922852
2020	63.1079483032227