Year	% of expense
1993	10.183134732328018
1994	11.22807936799034
1995	8.168956452037825
1996	7.865470116241998
1997	9.424033289001278
1998	8.953295931382868
1999	9.113645905212618
2000	9.993609886968857
2001	10.049045308030907
2002	10.307140981689248
2003	9.7257902921567
2004	10.03066698363332
2005	10.109057123168366
2006	10.837597618831746
2007	10.610102596000651
2008	10.581293729239263
2009	10.05415558544409
2010	9.844270783948565
2011	9.530436547048899
2012	9.747635614632234
2013	9.607876130742255
2014	8.898868328889897
2015	9.329742764647648
2016	8.990900552489798
2017	8.69416104203947
2018	8.899597517741912
2019	8.812191913198665
2020	8.576617512982747
2021	8.953455884004088
2022	9.40890788678735