Year	% of expense
1996	0.9067903838043019
1997	1.0860938217970675
1998	3.7735452846433293
1999	3.737431566894479
2000	3.378102824828036
2001	0.3010940486779203
2002	2.6457604346606427
2003	3.666020890629022
2004	5.676119419655323
2005	0.3567676641599318
2006	0.369571928368772
2007	0.9932722769623709
2008	0.563620053785497
2009	0.44339245036902686
2010	0.7711164944528375
2011	0.6323295156946178
2012	0.7196231881461946
2013	0.5870904394989589
2014	0.6816029623485814
2015	0.5148061416806381
2016	0.43561464601676714
2017	0.47877052865853015
2018	0.4759815678593544
2019	0.6683792378623873
2020	2.8016188911591176
2021	3.525224817283332
2022	3.3880312185767343