Year	% of total labor force
1991	39.61065859994007
1992	40.527112092520845
1993	40.8409209208216
1994	41.31962799671754
1995	41.62082583681504
1996	42.10548993329395
1997	42.37495580065503
1998	42.53493354337958
1999	43.27338302022441
2000	43.422790659223196
2001	43.74160306945979
2002	43.87366513406289
2003	44.42099587515695
2004	44.673248220525366
2005	44.645377835680186
2006	44.94646402856349
2007	45.26229030090156
2008	45.45288276987987
2009	45.70621507609389
2010	46.04819932728796
2011	46.2904510387937
2012	46.354336254793026
2013	46.33639862594723
2014	46.090413509048005
2015	46.341816023021174
2016	46.429650065229154
2017	46.55130803527973
2018	46.57244829725353
2019	46.739819021971584
2020	46.94934843057359
2021	47.24198554878535
2022	47.30982262411911
2023	47.239064088300985