Year	% gross
1971	0.0183499995619059
1972	0.0664199963212013
1973	0.123929999768734
1974	0.236739993095398
1975	0.200249999761581
1976	0.213300004601479
1978	0.371089994907379
1979	0.32710000872612
1982	0.607150018215179
1983	0.584500014781952
1984	0.661629974842072
1985	0.664309978485107
1986	0.705789983272552
1987	0.66991001367569
1988	0.576030015945435
1991	0.602310001850128
1992	0.682529985904694
1993	0.652989983558655
1994	0.672519981861115
1995	0.700630009174347
1996	0.746349990367889
1997	0.945510029792786
1999	1.26757001876831
2000	1.43419003486633
2001	1.72801995277405
2006	3.14749002456665
2007	3.93159008026123
2008	4.14797019958496
2009	5.4761700630188
2010	6.87252998352051
2011	5.26460981369019
2012	6.86541986465454
2013	8.45265960693359
2014	8.14476013183594
2015	7.4142599105835
2016	7.33077001571655
2017	7.17589998245239
2018	7.6603798866272
2019	6.99536991119385
2020	7.35094022750854
2021	7.34034013748169