Year	% gross
1970	11.2985095977783
1971	12.0413904190063
1972	12.1347103118896
1973	12.3166399002075
1974	12.7461595535278
1975	12.9017095565796
1977	14.6793098449707
1978	18.2990608215332
1979	22.4937305450439
1980	25.998929977417
1981	19.8267803192139
1982	19.5969009399414
1983	19.7403907775879
1984	21.9215698242188
1985	23.8488292694092
1986	25.8086204528809
1987	28.6452903747559
1988	30.4959506988525
1989	34.3184814453125
1990	35.2961883544922
1991	34.9074096679688
1992	38.0396614074707
1994	38.9450416564941
1995	38.8950805664062
1996	42.3347015380859
1998	44.846851348877
1999	55.7961883544922
2000	61.0354690551758
2001	74.779426574707
2002	79.4678573608398
2003	85.542350769043
2004	85.6392822265625
2005	84.0469818115234
2006	82.2529525756836
2007	82.2577209472656
2008	81.6394119262695