Year	% gross
1970	16.9374008178711
1971	17.1767902374268
1972	18.8665904998779
1973	19.3190593719482
1974	21.8440799713135
1975	24.2372303009033
1977	28.7045402526855
1979	31.5075607299805
1980	38.6836891174316
1982	36.0160484313965
1983	40.6667518615723
1984	38.1428184509277
1985	38.269100189209
1986	37.826488494873
1987	40.3484115600586
1988	40.3438682556152
1989	38.654239654541
1998	49.4517784118652
1999	54.931999206543
2000	56.1560096740723
2001	59.292049407959
2002	63.5084609985352
2004	67.3077163696289
2005	70.2627105712891
2006	70
2007	72.8222579956055
2008	71.3550872802734
2010	70.7751770019531