Year	% of expense
1995	6.421904394127143
1996	4.613100392057875
1997	4.105328114852688
1998	5.312685220302328
1999	5.481441252633194
2000	5.488274519353194
2001	5.822553936357414
2002	5.9442403699436746
2003	5.900565643936117
2004	5.355831250725263
2005	5.534829986948326
2006	8.033286003287197
2007	5.7299074224173845
2008	5.347111379658775
2009	5.74188453379572
2010	5.39354147172454
2011	5.274339892776091
2012	5.922265722302567
2013	5.281647514687294
2014	5.946364661931611
2015	6.858450990921856
2016	5.472320398068302
2017	7.208716394624144
2018	6.017267810812162
2019	5.940817218099712
2020	8.477504110689674
2021	13.16880351904142
2022	12.298197390513373