Year	% gross
2001	53.844970703125
2002	54.7403717041016
2003	57.2420883178711
2004	58.9603881835938
2005	61.4387397766113
2006	65.5718383789062
2007	64.3384094238281
2008	71.0243377685547
2009	71.6965789794922
2010	71.4817504882812
2011	68.989616394043
2012	70.9190368652344
2013	72.3086471557617
2014	73.1753234863281
2015	72.6365585327148
2016	74.8292388916016
2017	74.56298828125
2018	74.8911895751953