Year	% of expense
2009	1.2546796996927765
2010	0.8434506773023631
2011	1.330448658069319
2012	2.3347260337331566
2013	1.5403059710077984
2014	1.381875689745241
2015	1.4191739891354886
2016	0.7175010639197512
2017	1.565270628013624
2018	0.3654675293836262
2019	0.5025278139429206
2020	0.6550801916240155
2021	1.7010800644296602
2022	0.6258987131858297