Year	% of expense
2010	57.84715297915235
2011	57.097244607634735
2012	59.206345608251674
2013	59.14839728909753
2014	58.855429095307635
2015	52.10484148263641
2016	56.98293927413061
2017	59.405829884725605
2018	58.95353990238355
2019	61.655797555805705
2020	70.62033863900044
2021	62.93283601179556
2022	63.55476988173346