Year	% gross
2000	1.63868999481201
2001	1.44193005561829
2002	3.58292007446289
2003	4.50093984603882
2004	6.0780200958252
2005	7.5032901763916
2006	8.84867000579834
2007	10.596170425415
2008	13.3501901626587
2009	16.9507808685303
2010	19.6169109344482
2011	22.879150390625
2012	22.6796894073486
2013	25.2982597351074
2014	25.8976993560791
2015	24.3741092681885
2016	25.2035503387451
2017	25.3076705932617
2018	24.1816997528076