Year	% of expense
2002	12.935665613959678
2003	12.542056056948951
2004	11.958157103936937
2005	9.699809127190699
2006	9.551183964696634
2007	9.056288599757865
2008	7.711305696732186
2009	7.7059100911663
2010	8.064989456744602
2011	7.334035734150568
2012	8.473848647049675
2014	11.306628943725661