Year	% of expense
1994	2.9407586304872875
1995	7.002947949065932
1996	5.744688471751723
1997	5.976830755697557
1998	9.940658836799436
1999	6.905866220485679
2000	5.803031506164366
2001	6.772542285880869
2002	5.255891339687984
2003	5.749606137501723
2004	6.123997063271864
2005	6.230965459183581
2006	6.2414054607194265
2007	6.128279804006512
2008	6.294488650382432
2009	5.712439142298152
2010	6.2437410477745505
2011	6.159508372424378
2012	5.926495001352791
2013	6.21453614229672
2014	6.091968294529244
2015	6.152548036106875
2016	6.08959931533593
2017	6.0755508280470565
2018	5.938185227649383
2019	5.726849186009996
2020	5.208394408346367
2021	5.207732752760161
2022	5.5408141875154175