Year	% gross
1971	48.4930801391602
1972	50.0857810974121
1973	50.2316513061523
1974	49.8280601501465
1975	50.1582984924316
1976	51.9241485595703
1977	60.7327919006348
1978	63.8297004699707
1979	66.5053787231445
1980	68.9989929199219
1981	71.2145309448242
1982	75.0686416625977
1983	79.0007095336914
1984	82.7301712036133
1985	84.4043884277344
1986	85.1967086791992
1987	79.6518020629883
1988	75.0507507324219
1989	69.8018569946289
1990	64.9277267456055
1992	51.8044281005859
1993	51.34619140625
1994	66.4008407592773
1995	89.0937118530273
1996	93.088981628418
1997	89.8802032470703
1998	88.7192687988281
1999	88.8412933349609
2000	89.6838226318359
2001	91.6395797729492
2003	100.044799804688
2004	104.96346282959
2005	113.973609924316
2006	103.891807556152
2007	102.411262512207
2008	102.252906799316
2009	101.989196777344
2010	101.868667602539
2011	98.7980804443359
2012	99.8524322509766
2013	96.0036773681641
2014	93.3477478027344
2015	99.571533203125