Year	% of expense
2002	10.516135193235476
2003	0.394735785727149
2004	1.6689463456109426
2005	2.1113509838229665
2006	5.028621651142435
2007	3.2661960573625115
2008	1.8880894614467871
2009	10.044951575616201
2010	6.712195214187424
2011	10.313282157358964
2012	5.866612778354465
2013	8.791376597550476
2014	9.15796377876709
2015	6.008664193651036
2016	7.820871850965299
2017	7.3460225284996294
2018	8.409909970088641
2019	8.534786036460115
2020	8.212896817336143
2021	18.394173238009586