Year	% gross
2001	19.1893501281738
2002	19.4421997070313
2003	21.85133934021
2004	21.9714202880859
2005	22.0836200714111
2006	24.5731201171875
2007	23.7174797058105
2008	27.2279300689697
2009	37.5259208679199
2010	31.1184005737305
2011	34.8313789367676
2012	39.3052597045898
2013	36.5957298278809
2014	41.6347999572754
2015	44.9970588684082
2016	44.034610748291
2017	46.1664886474609
2018	47.3694190979004