Year	% gross
1970	25.6145801544189
1971	27.5613994598389
1972	32.7484703063965
1973	34.1526107788086
1974	43.293628692627
2012	90.8357467651367
2013	100.666313171387
2014	99.3065338134766
2015	98.2119293212891
2016	100.465858459473
2017	101.490379333496
2018	103.442672729492
2019	101.970031738281
2020	101.852668762207
2021	103.277297973633