Year	% of expense
2003	5.8722021341666615
2004	6.859882082323235
2005	5.877870078681277
2006	6.200023827425877
2007	6.635679599501427
2008	6.316206758901949
2009	6.389404854238294
2010	6.507623876706015
2011	6.0643877430501965
2012	6.056938601466535
2013	5.966063986892468
2014	6.019166478230428
2015	5.929209153661583
2016	5.796960583958571
2017	5.669258378593379
2018	6.107270420743015
2019	5.716211728350273
2020	6.001869944825865
2021	6.050787855899035
2022	7.688839749988037