Year % gross 1994 26.6720104217529 1996 31.5789909362793 1998 23.9305896759033 1999 5.25450992584229 2010 18.6073894500732 2011 18.7984409332275 2012 18.9204292297363 2013 18.5010509490967 2014 18.9786701202393 2015 18.7390308380127 2016 18.2145404815674 2017 18.4955196380615 2018 17.7050399780273 2019 17.9253997802734 2020 17.6966991424561