Year	% of expense
1994	0.15608099354917254
1995	0.2767877867330012
1996	2.2762807783357926
1997	2.779514974636926
1998	1.9014858610439773
1999	2.2807321664168625
2008	0.44019654035134953
2009	0.9578404167275206
2010	0.44564788176228354
2011	1.7622793254293996
2012	0.742686350874015
2013	1.2690042628686888
2014	0.6455718524538631
2015	1.5682376243499676
2016	3.736947155757856
2017	2.5181083107947724
2018	4.4885220079923
2019	3.1918825218285445
2020	2.3892649400424033
2021	2.4735703865955725