Year	% gross
1999	7.01732015609741
2000	7.38927984237671
2001	8.77227020263672
2002	9.91816997528076
2003	9.06820011138916
2004	10.8283596038818
2005	12.0798501968384
2006	13.8906402587891
2007	13.5147399902344
2008	14.4013996124268
2009	15.0994701385498
2010	15.7970600128174
2011	14.9628095626831
2012	16.1766204833984
2013	18.4803905487061
2014	17.5828895568848
2015	17.2992706298828