Year	% gross
1970	36.7823295593262
1971	38.8768615722656
1972	37.2640419006348
1973	37.6047782897949
1974	39.2698211669922
1975	42.0844917297363
1976	43.3669891357422
1977	46.1129608154297
1978	47.3837699890137
1979	46.5008201599121
1980	48.1423416137695
1981	50.754581451416
1982	56.9601516723633
1983	59.5706787109375
1984	65.0346069335938
1985	69.8279571533203
1986	71.1120376586914
1987	72.8136215209961
1988	74.3294982910156
1989	70.9123611450195
1990	71.9388427734375
1991	72.7129135131836
1992	65.4282531738281
1993	70.0227127075195
1994	70.0231781005859
1995	70.0884017944336
1996	70.8700408935547
1997	117.374649047852
1998	123.427581787109
1999	128.445495605469
2000	128.961120605469
2001	130.852157592773
2002	134.560134887695
2003	135.173553466797
2004	126.576171875
2005	120.285217285156
2006	119.035682678223
2007	118.373458862305
2008	121.45825958252
2009	122.992980957031
2010	120.498428344727
2011	113.124282836914
2012	112.977607727051
2013	111.623123168945
2014	112.744003295898
2015	103.624588012695
2016	105.913589477539
2017	105.526321411133