Year	% of expense
2011	0.22946495087699373
2012	0.1991841176060806
2013	0.14334678366601794
2014	0.17251008381863864
2015	0.17049717545637064
2016	0.1521547241373123
2017	0.23806767615793023
2018	0.37249423999840947
2019	1.1693153424912763
2020	1.3608046210125184