Year	% gross
1998	20.6039791107178
1999	19.6211204528809
2000	18.7345294952393
2001	26.4385108947754
2002	27.7017993927002
2003	28.260669708252
2005	29.7254600524902
2010	36.0323905944824
2011	41.3044700622559
2012	42.3032493591309
2013	39.2910690307617
2014	34.6291389465332
2015	38.9163513183594
2016	38.1204986572266
2018	34.5148887634277
2019	32.6431541442871