Year	% of expense
1994	2.075254166229955
1995	1.6561692872354885
1996	0.9965754045190165
1997	0.9709492095161408
1998	0.28670595888730044
1999	0.2420131754066501
2002	0.07007302125804477
2003	0.20656890523529117
2004	0.15789646798166476
2008	3.4061330044404916
2009	4.521730147343886
2010	2.252723773639049
2011	0.4643729444458609
2012	0.3027675976241628
2013	1.0859905159022156
2014	4.339798977049818
2015	7.345165958584659
2016	9.726138641995217
2017	7.911107430756919
2018	10.997185893664803
2019	11.236660119478909
2020	12.889358983919049
2021	11.367237979390389
2022	22.195818731616686