Year	% of expense
2013	10.806995540169318
2014	10.214182400053781
2015	12.39880392871346
2016	15.89597129386526
2017	10.942287432969257
2018	10.235951723826581
2019	6.424657514684687
2020	5.676295249279147
2021	7.003574171370522
2022	5.452477861523619