Year	% of expense
2011	3.440830802226226
2012	5.172846134270783
2013	1.460761380148349
2014	0.14231296650555936
2015	0.11116503786997288
2016	0.08796330051941378
2017	0.16210951250912126
2018	0.32838665552887825
2019	1.0432088088878144
2021	0.7854165622425542
2022	0.8194137463172322