Year	% of expense
2009	14.701925388125826
2010	14.701925388125826
2011	23.00779021139476
2012	22.57551254439448
2013	17.83013459410827
2014	18.78236088530358
2015	16.884220697921776
2016	13.20167324737002
2017	11.857409804048903
2018	12.087813959728244
2020	9.148495814742029
2021	10.152276823624648
2022	12.28277876592655