Year	% of total labor force
1991	17.752746271782176
1992	18.077860654373918
1993	17.957006638465202
1994	18.28051823202315
1995	18.205460288131505
1996	18.17762557770034
1997	18.22748598274811
1998	18.340128926492838
1999	18.8333527963171
2000	19.275804605712143
2001	19.61453631691073
2002	19.41386485672549
2003	19.786009072705717
2004	20.12948822703151
2005	20.489041304097384
2006	20.566553086971926
2007	20.897551184697377
2008	20.17679130138161
2009	20.52805197018103
2010	20.301047450548214
2011	20.048254385690388
2012	20.313022849779298
2013	20.15078649583335
2014	20.155586675283832
2015	20.72463434471519
2016	21.280384294203277
2017	21.10574951088255
2018	20.097653072193395
2019	19.29208087383915
2020	18.28385340164206
2021	18.343235067948324
2022	18.187328616673774
2023	18.48905428185945