Year	% of expense
2011	1.2724822398010043
2012	0.9325945319292801
2014	2.8780346037413604
2015	2.639690673893853
2016	3.2715742056179797
2017	6.089578442409937
2018	9.962579500192408
2019	8.085825657449721
2020	8.133083461538702
2021	9.649041750160027