Year	% of total employment
2009	20.762188644595604
2010	21.63245290125266
2011	21.643832799827557
2012	18.44255984663601
2013	19.652529912727864
2015	18.37873609802438
2016	18.919339277237817
2017	18.74177267249099
2018	17.631487334503436
2019	17.476306903971278
2020	19.890617799766034
2021	17.92543128698858