Year	% gross
1971	3.92557001113892
1972	4.2421498298645
1973	4.67951011657715
1974	5.11982011795044
1984	11.5276098251343
1986	12.3954296112061
1987	13.6511096954346
1988	15.0397500991821
1989	15.1008596420288
1991	13.8745899200439
1992	12.014949798584
1993	10.6603097915649
1994	10.2953701019287
1995	10.3989601135254
1996	10.913459777832
1999	12.9054403305054
2000	13.9824304580688
2001	16.7692108154297
2002	18.5895805358887
2003	19.0287704467773
2004	21.0001201629639
2005	23.440860748291
2006	27.2698707580566
2007	30.3098297119141
2008	31.6366291046143
2009	32.1730117797852
2010	33.7502288818359
2011	35.3596687316895
2012	37.2147407531738
2013	33.4700012207031
2014	34.0999984741211
2015	34.8671417236328