Year	% gross
2005	15.9614000320435
2006	16.9455509185791
2007	15.5565595626831
2008	16.7704601287842
2009	17.1231307983398
2012	14.7151002883911
2013	17.4451103210449
2014	20.3796005249023
2015	21.8198299407959