Year	% gross
2009	88.2187881469727
2010	87.043830871582
2011	83.2748794555664
2012	85.0389633178711
2013	87.8342132568359
2014	90.3880081176758
2015	99.7226028442383
2016	89.1104507446289
2018	93.1135482788086