Year	% gross
1971	47.895938873291
1972	45.4237785339355
1974	44.0076484680176
1990	93.0645523071289
1991	95.9813766479492
1992	98.2731323242188
1993	99.4430236816406
1999	96.7755889892578
2000	95.1632766723633
2001	91.6676406860352
2002	89.7232666015625
2003	88.8618927001953
2004	88.3932418823242
2005	86.0443801879883
2006	83.0568466186523
2007	81.0230178833008
2008	83.25341796875
2009	85.6988067626953
2010	89.6814193725586
2011	94.3245468139648
2012	95.0684509277344
2013	91.8124618530273
2014	88.1862869262695
2015	88.4760589599609
2016	96.7974319458008
2017	96.4568634033203
2018	97.0742263793945
2019	91.8164596557617
2020	91.7337188720703
2021	87.769660949707