Year	% of expense
1993	16.06132164889267
1994	11.22807936799034
1995	7.363222720422853
1996	7.7266612153993925
1997	9.463002517740598
1998	8.202903895025523
1999	9.15104009954765
2000	9.80991022013285
2001	9.762362026121892
2002	10.2845535394227
2003	9.7257902921567
2004	10.038415629544685
2005	10.109057123168366
2006	10.386069093363517
2007	10.441081439474319
2008	10.44357574636072
2009	10.220639603697439
2010	9.91876157391666
2011	9.30736800122329
2012	7.840577725373353
2013	8.323899469410305
2014	8.25800146591742
2015	8.627257492254547
2016	8.587569258430847
2017	8.109958575142379
2018	8.545662877277376
2019	8.216185390197522
2020	7.480256818610689
2021	7.124441728983625
2022	7.249225031433228