Year	% gross
1970	20.3592300415039
1971	21.3443698883057
1972	22.4689998626709
1973	23.9267292022705
1974	25.1899394989014
1975	45.9984397888184
1976	48.5592613220215
1977	49.0043182373047
1978	48.4118804931641
1979	50.583381652832
1980	51.6848602294922
1981	53.1414909362793
1982	57.3440589904785
1984	62.3618202209473
1985	62.6857299804688
1986	63.1889610290527
1987	61.2237396240234
1988	60.3320083618164
2010	105.656341552734
2011	105.513778686523
2012	104.262107849121
2013	102.0625
2014	90.6091232299805
2015	91.9357528686523
2016	91.4696807861328
2017	102.146629333496
2018	94.1568603515625
2019	91.6584777832031
2020	91.6810607910156