Year	% gross
1970	7.89176988601685
1971	9.58697986602783
1972	10.7028799057007
1973	12.4528303146362
1975	10.2005701065063
1976	12.4845399856567
1977	13.8633298873901
1978	14.3507404327393
1979	14.3784704208374
1980	15.1043796539307
1981	17.8906002044678
1982	18.9360008239746
1983	19.0459098815918
1986	18.3944206237793
1990	14.3241996765137
1991	15.7648296356201
1992	16.0917301177979
1993	17.2688407897949
1994	17.8855991363525
1999	24.7947006225586
2000	19.8136806488037
2001	23.7115497589111
2002	30.7126197814941
2005	30.3124694824219
2006	34.891731262207
2007	35.4942588806152
2010	48.3588485717773
2011	47.704761505127
2012	48.2561302185059