Year	% gross
1974	44.4306602478027
1975	53.0800895690918
1976	69.3450469970703
1977	71.770378112793
1978	70.1516876220703
1979	76.4702529907227
1980	76.5138778686523
1981	69.40673828125
1982	72.4081115722656
1983	76.7052688598633
1984	73.920768737793
1985	71.8992691040039
1986	74.2372665405273
1987	71.176628112793
1988	77.4274063110352
1989	75.6428070068359
1990	76.4152679443359
1991	75.2348175048828
1995	77.353141784668
1996	78.253776550293
1999	78.7223205566406
2000	82.8067398071289
2001	77.2872085571289
2002	81.3065338134766
2003	79.5913314819336
2004	89.304817199707
2005	91.4990692138672
2007	89.1363220214844
2011	92.3600006103516