Year	% of expense
1993	4.716383311759003
1994	4.924892882746203
1995	5.002432096785523
1996	6.15278998482682
1997	6.772447443430376
1998	6.521579361999229
1999	6.751212472014973
2000	7.01620429286502
2001	6.3233072931805525
2002	5.255891339687984
2003	5.749606137501723
2004	6.123997063271864
2005	6.230965459183581
2006	6.2414054607194265
2007	6.128279804006512
2008	6.294488650382432
2009	6.202114883863257
2010	6.2437410477745505
2011	6.159508372424378
2012	5.926495001352791
2013	6.21453614229672
2014	6.091968294529244
2015	6.152548036106875
2016	6.08959931533593
2017	5.996761799071601
2018	5.800158246640988
2019	5.678804401978389
2020	5.1716514990049784
2021	5.207732752760161
2022	5.5408141875154175