Year	% of expense
1993	0.01808154778049001
1994	0.4666142570943119
2004	2.9539382737946935
2005	2.5238530116843854
2006	2.2562277111922215
2007	2.0691726333543845
2008	1.7506514243929323
2009	2.831866008999937
2010	4.598817664736713
2011	4.612615460218032
2012	5.95818598642571
2013	5.551653551271732
2014	5.410171054287941
2015	5.228997361841992
2016	4.727756123400896
2017	4.192192083358998
2018	3.334660632343336
2019	3.054999920338415
2020	1.936636062217328
2021	1.4285445026408967
2022	1.0406079860629063