Year	% gross
1970	25.954610824585
1971	28.109260559082
1972	33.4781494140625
1973	35.1854400634766
1974	45.2598114013672
1975	47.4099998474121
1976	50.5740814208984
1977	53.2825584411621
1978	54.604061126709
1985	50.8612785339355
2012	94.3209762573242
2013	103.917678833008
2014	102.635528564453
2015	100.920516967773
2016	102.569511413574
2017	103.015960693359
2018	105.00707244873
2019	103.953277587891
2020	104.125999450684
2021	106.651901245117