Year	% of total labor force
1991	34.55681337926418
1992	34.71897186906764
1993	35.08799928592706
1994	35.30284238638364
1995	34.926585559428354
1996	35.1097387311086
1997	35.3114887522596
1998	35.46276343941544
1999	35.55642827371993
2000	35.61868861995184
2001	35.538728582931085
2002	35.51295233982883
2003	35.72961581830112
2004	35.92768161443339
2005	36.179312609238636
2006	36.42358558547941
2007	36.486134951480835
2008	36.57407160486972
2009	36.76049596033721
2010	36.927207630730756
2011	37.025793676469384
2012	37.039669319273756
2013	37.075268881761815
2014	37.14023262246899
2015	37.13282442624459
2016	36.895995758850276
2017	36.67220771868353
2018	36.41971381932746
2019	36.76870350631279
2020	36.81508713506621
2021	36.96973378420634
2022	36.898765941295764
2023	36.963792742055695