Year	% of total labor force
1991	23.66964457426317
1992	23.708282043978105
1993	23.86782918257653
1994	24.014440058297836
1995	23.977035796502346
1996	24.136486396688774
1997	24.311589834126803
1998	24.52341660278403
1999	24.62840684754593
2000	24.772749286555896
2001	24.90069298979428
2002	25.042555934139834
2003	25.25324349577055
2004	25.47942334926441
2005	25.720973151269554
2006	25.624118016981953
2007	25.52126592873198
2008	25.436289304769552
2009	25.382468417839068
2010	25.31959279839269
2011	25.050630144735
2012	24.753083357469073
2013	24.912227991540576
2014	25.079000040993865
2015	25.272674852090564
2016	25.365690683385747
2017	25.577909332986227
2018	25.556679146822102
2019	25.7617536351485
2020	25.67783414808073
2021	26.090209465730187
2022	26.323763620793127
2023	28.396565158803952