Year	% gross
2004	55.3442306518555
2005	55.8390007019043
2008	54.851490020752
2009	65.3003005981445
2010	68.390998840332
2011	71.6549987792969
2012	71.8610000610352
2013	70.1360015869141
2014	72.447998046875
2015	76.0169982910156
2016	81.0940017700195
2017	85.4300003051758
2018	88.2070007324219
2019	91.1640014648438
2020	91.4889984130859