Year	% gross
1999	64.3039627075195
2000	64.6291198730469
2001	65.2097473144531
2002	66.6797637939453
2003	69.222412109375
2004	70.8772583007812
2005	71.308479309082
2006	72.0884475708008
2007	73.4483184814453
2008	75.8500823974609
2009	77.3483581542969
2010	77.3968887329102
2011	78.8900909423828
2012	80.3691329956055
2013	81.2852096557617