Year	% of expense
2005	0.9605353700197362
2006	10.357057377227529
2007	10.634495084897232
2008	1.285628407963989
2009	13.43956624901678
2010	11.086063850435416
2011	3.2394349990609848
2012	2.2009228664593556
2013	1.470774422862427
2014	1.8249252801799707
2015	1.70786151251797
2016	1.3782721346372862
2017	1.7470250431819532
2018	1.4347638293286715
2019	1.0550653262676595
2020	1.027581859738058
2021	1.0547507466128465