Year	% of expense
2011	1.1117492457994178
2012	0.8320245256303972
2013	0.5148292242628716
2014	0.45175954197291146
2015	0.36234379076922507
2016	0.33008504754975515
2017	0.39079662677684035
2018	0.2952012990228753
2019	0.5281410747518271
2020	0.6141598253681767
2021	0.6985220215076858
2022	1.269440734194488