Year	% gross
1971	6.94285011291504
1972	8.41606044769287
1973	9.83265018463135
1974	10.6497297286987
1975	11.696590423584
1976	13.6145401000977
1977	14.5447797775269
1978	15.3718004226685
1979	16.2905902862549
1980	17.4031295776367
1981	18.3775997161865
1982	18.724739074707
1983	19.6684494018555
1984	20.809700012207
1985	22.7470397949219
1986	24.3087196350098
1987	25.6123104095459
1988	27.6136894226074
1989	28.934419631958
1990	30.7633094787598
1991	32.2944602966309
1992	35.5078582763672
1993	37.8486213684082
1994	40.6989517211914
1995	44.5915184020996
1996	48.1068305969238
1997	50.2760887145996
1998	53.5244789123535
2013	88.642448425293
2014	88.4313507080078
2015	89.9054870605469
2016	90.9407424926758
2017	92.1069183349609
2018	94.4988479614258
2019	95.4495697021484
2020	98.3636474609375
2021	105.239669799805