Year	% gross
1970	15.2336101531982
1971	17.2084102630615
1972	19.3055305480957
1973	20.066930770874
1974	20.3994903564453
1975	21.2533397674561
1976	22.6093406677246
1977	23.6432991027832
1978	24.4882392883301
1981	33.6163291931152
1982	18.4163703918457
1984	20.6187191009521
1985	20.2999992370605
1986	17.7917709350586
1988	19.7959098815918
1991	26.154109954834
1993	27.1843700408936
1994	39.0706100463867
1995	35.1166915893555
2001	28.3772106170654
2003	20.8491401672363
2004	31.6032295227051
2005	30.4927291870117
2006	43.3985290527344
2007	42.1332702636719
2008	54.544979095459
2009	59.7020797729492
2010	67.0412673950195
2011	66.8874893188477
2012	69.2983627319336
2013	70.166618347168
2014	69.26123046875
2015	67.9470825195312
2016	67.6436233520508
2017	70.172119140625
2018	72.1454467773438