Year	% of expense
2005	10.504397380750158
2006	9.645281672037004
2007	10.634495084897232
2008	8.829739367495014
2009	12.246893660194234
2010	9.369162406471645
2011	6.070051283664794
2012	3.4936770351612756
2014	4.176942991241368