Year	% gross
2010	61.4889297485352
2011	63.3208999633789
2012	64.8973922729492
2013	67.1677474975586
2014	69.9195175170898
2015	75.0025405883789
2016	74.6949005126953
2017	74.8247299194336
2018	70.7490768432617
2019	72.6849365234375
2020	73.8570709228516