Year	% of expense
2010	13.638410703383878
2011	12.781853760646461
2012	12.303855298816867
2013	12.193020020509667
2014	11.818418628564702
2015	10.902535608101866
2016	11.004561001135636
2017	11.602377582663506
2018	11.700988021305637
2019	11.8793284611339
2020	10.301026084494252
2021	10.818742755610813
2022	9.310572905792288