Year	% gross
1971	44.0756988525391
1972	45.5882415771484
1974	45.2005615234375
1990	90.9996109008789
1991	94.0617065429688
1992	96.5705795288086
1993	97.3664398193359
1999	92.7665405273438
2000	92.6435089111328
2001	89.5360717773438
2002	88.0787506103516
2003	87.6809463500977
2004	88.7226181030273
2005	87.8703079223633
2006	85.0722885131836
2007	83.0715866088867
2008	82.616081237793
2009	83.766731262207
2010	88.6984405517578
2011	95.1630401611328
2012	94.4583129882813
2013	91.7267303466797
2014	86.8292694091797
2015	88.8930892944336
2016	95.0324478149414
2017	94.0896530151367
2018	94.0812911987305
2019	89.2456970214844
2020	89.0270919799805
2021	84.9695281982422