Year	% of central government expense
2012	2.463075281062493
2013	3.0349507596122196
2014	4.007280863729645
2015	3.996336171681928
2016	1.7370242414867096
2017	4.546665773062126
2018	5.063570425654055
2019	5.068903452585678
2020	2.111698204129177
2021	3.606727124710206