Year	% gross
1971	10.6204299926758
1973	11.2568302154541
1974	12.7787704467773
1975	12.3694696426392
1976	12.714409828186
1977	13.8335304260254
1978	13.4747104644775
1979	14.3844995498657
1980	15.3657503128052
1981	15.905369758606
1983	18.7380695343018
1984	20.895580291748
1985	22.1154003143311
1986	21.2407608032227
1987	20.1426696777344
1988	19.6298007965088
1989	20.2470397949219
1990	19.868839263916
1991	20.1027393341064
1992	20.1748294830322
1993	23.0850105285645
1994	23.2034492492676
1995	26.1304492950439
1996	24.5123691558838
2008	49.9355697631836
2009	50.2772102355957
2010	49.5370101928711
2021	92.6070022583008