Year	% gross
1988	8.09585952758789
1989	8.84815979003906
1990	8.88632965087891
1991	9.92759990692139
1992	11.1443395614624
1993	13.1359901428223
1994	15.9919395446777
2012	20.2777404785156
2013	21.3076000213623
2014	21.35618019104
2015	22.2706604003906
2016	22.466760635376
2017	25.3459606170654
2018	27.9371891021729
2019	28.9340000152588
2020	30.9141902923584
2021	31.5493297576904