Year	% gross
1970	26.2972507476807
1971	28.6615200042725
1972	34.2138290405273
1973	36.2269897460938
1974	47.243091583252
2012	97.9080200195312
2013	107.282928466797
2014	106.121192932129
2015	103.753479003906
2016	104.766120910645
2017	104.605270385742
2018	106.633720397949
2019	106.028106689453
2020	106.519920349121
2021	110.227439880371