Year % gross 1999 20.0062694549561 2001 24.0463695526123 2003 26.2289695739746 2004 27.705150604248 2005 27.7579307556152 2008 28.6948699951172 2010 31.3564491271973 2011 33.1506004333496 2012 34.2055206298828 2013 36.9513816833496 2016 39.8327713012695