Year	% of total labor force
1991	27.715051054841894
1992	28.045017409445443
1993	28.378301097145275
1994	28.722634264900815
1995	29.076535374580736
1996	29.439049091028735
1997	29.803464608533204
1998	30.170679274440953
1999	30.542844871530033
2000	30.915141095240912
2001	31.006118756619017
2002	31.176450202047505
2003	31.331812030095662
2004	31.480350343031965
2005	31.623132493466265
2006	31.752570427198123
2007	31.86732233142972
2008	31.985302258295466
2009	32.12585438228791
2010	32.29268235445964
2011	32.48407862814292
2012	32.69890388067231
2013	32.90352564315868
2014	33.01551490182615
2015	33.12395076743868
2016	33.22656165407448
2017	33.32425405472329
2018	33.411864401686415
2019	33.50101532662022
2020	33.47341984412088
2021	33.71230419838639
2022	33.32678201106792
2023	33.39481860712946