Year	% gross
1971	9.86565971374512
1972	12.2741804122925
1973	17.1561908721924
1974	23.2908096313477
1975	28.1071796417236
1976	35.3743286132812
1977	41.072868347168
1978	44.7576293945312
1979	49.1058883666992
1980	51.7435684204102
1981	50.563648223877
1983	56.940990447998
1986	71.7422790527344
2002	114.91544342041
2003	109.615531921387
2005	100.824966430664
2006	104.68717956543