Year	% of tax revenue
2011	4.929266874300912
2012	5.090730983430268
2013	5.3510069620043765
2014	5.906566066575831
2015	5.5016602242618085
2016	4.601861813002512
2017	5.186860136235005
2018	3.6526634223284367
2019	4.022228115229238
2020	4.425752017265047