Year	% gross
1976	68.7428817749023
1977	66.3507308959961
1978	60.4208717346191
1979	54.2977104187012
1980	46.5616798400879
1981	43.3653793334961
1982	38.8574600219727
1983	35.7546691894531
1984	35.3033790588379
1985	36.6665916442871
1986	38.2920799255371
1987	40.4988288879395
1988	42.7910690307617
1989	43.7472114562988
1990	44.9014091491699
1991	47.4911918640137
1992	50.0868492126465
1993	52.1878318786621
1994	51.212818145752
1995	52.3312606811523
1996	55.1432914733887
1997	57.4310493469238
2001	63.5907592773438
2003	65.153938293457
2006	73.7276000976562
2007	77.5776596069336
2008	81.6589431762695
2009	86.9233779907227
2010	90.8825988769531
2011	92.0818176269531
2012	92.0829772949219