Year	% of expense
2002	8.188801269253712
2003	7.5838349771848605
2004	7.372939102412127
2005	8.619625870403896
2006	7.161979472401586
2007	7.835916532105994
2008	6.92082254878388
2009	8.881822136439855
2010	8.561388564888151
2011	6.927212442413293
2012	5.517150566145233
2014	9.374255643449604