Year	% gross
1970	8.88566017150879
1971	9.95170974731445
1972	11.0403900146484
1973	11.5786199569702
1974	11.7392597198486
1975	12.2571201324463
1976	13.1584596633911
1977	13.9991502761841
1978	14.5838003158569
1980	17.6115207672119
1981	21.2858104705811
1982	13.3190698623657
1984	15.0001802444458
1985	14.6859302520752
1986	13.2240104675293
1988	14.6678104400635
1989	14.1261196136475
1990	12.3093795776367
1991	19.6126003265381
1993	18.6544399261475
1994	24.9947395324707
1995	23.9882106781006
2001	14.4715099334717
2003	14.078049659729
2004	19.2631397247314
2005	20.3119602203369
2006	29.6913509368896
2007	29.0891704559326
2008	39.090030670166
2009	44.3971710205078
2010	50.413688659668
2011	52.198429107666
2012	54.2063903808594
2013	54.7542190551758
2014	54.235481262207
2015	53.2851409912109
2016	53.5063400268555
2017	55.4021492004395
2018	57.0392990112305