Year	% gross
1992	75.8602676391602
1994	63.9997901916504
2008	76.1349411010742
2009	76.0430297851563
2011	74.6937484741211
2012	76.126579284668
2013	78.9735565185547
2014	82.6670074462891
2015	85.7226104736328
2016	88.0979919433594
2017	87.7059326171875
2018	87.2468566894531
2019	86.515983581543
