Year	% of expense
2010	10.391730747981216
2011	12.485117832275938
2012	9.760098295445205
2013	9.412979537057248
2014	9.876657627073035
2015	9.385810342472357
2016	12.015334009953843
2017	11.016478057136341
2018	9.0187586853501
2019	4.590983646611168
2020	4.43188163366729
2021	4.354566258240241