Year	% of total employment
1998	29.82969372667254
2000	27.6010571591907
2001	28.300685696293556
2002	28.998554908398685
2003	29.066160073954155
2004	29.466756289929783
2005	28.47593017093606
2006	28.830766617122666
2007	29.213731922224056
2008	29.53772240183032
2009	31.72554374539098
2010	31.10811316381706
2011	31.073849490077574
2012	30.961177295413936
2013	31.308759814925182
2014	31.141453379419083
2015	31.1813773738616
2016	30.989845257849776
2017	31.382897285548086
2018	31.074434512252182
2019	31.17213854357742
2020	35.540138926782305
2021	31.91979160081068
2022	31.40182573668104
2023	31.439383038336448