Year	% of expense
1992	21.35584137191851
1993	20.271012635048553
1994	19.775536297769584
2002	10.52724390632678
2003	10.047027406886858
2004	10.022918337721958
2005	10.036766548514949
2006	10.311291123828639
2007	10.545069837128297
2008	11.097910014812703
2009	10.70616002203092
2010	10.667021524208776
2011	11.190890603332134
2012	10.898746820510919
2013	8.651543146426041
2014	10.184020676558234
2015	10.731444871880882
2016	10.991201172616902
2017	11.37120621769179
2018	11.457495671419018
2019	11.19370431112242
2020	9.580250027866978
2021	10.66429386661461
2022	11.444488895583929