Year	% gross
1971	24.6969699859619
1972	27.2845306396484
1973	32.8208312988281
1974	38.7909812927246
1975	42.3969497680664
1976	48.8375816345215
1977	53.0744285583496
1978	54.489559173584
1979	57.862678527832
1980	60.0627593994141
1981	59.7231597900391
1983	65.5623016357422
1986	76.0694808959961
2002	111.412162780762
2003	106.46280670166
2005	93.1094589233398
2006	97.4502029418945