Year	% of expense
2006	0.41818406271217823
2007	0.3387145619307196
2008	0.43417858142955407
2009	0.1300450378694626
2010	4.072696542801205
2011	5.287539723218872
2012	3.855226700326348
2013	4.222537743073294
2014	6.231650289009437
2015	3.917409809399966
2016	7.24684229763876
2017	4.1153143106921375
2018	5.933119301563263
2019	7.143077705473851
2020	10.565006701999296
2021	10.437619564956996
2022	9.943267973681543