Year	% of total labor force
1991	43.24723547463889
1992	43.63768213714546
1993	44.16126924410098
1994	44.49682308090554
1995	44.65863643064356
1996	44.83517985113986
1997	44.859532265718805
1998	44.91106354856578
1999	45.199899830117296
2000	45.41267835602867
2001	45.55431348888156
2002	45.68003874628105
2003	46.34048866982402
2004	46.326209289442225
2005	46.956159102445724
2006	47.04356102443268
2007	47.31539828407236
2008	47.388035166289846
2009	47.81638883222102
2010	48.15995600581612
2011	47.718759981564844
2012	48.13322513495395
2013	48.43223954462412
2014	48.6134671664063
2015	48.81261826209888
2016	48.745382282345325
2017	48.882002704858394
2018	49.18190454026957
2019	49.37367711374001
2020	49.35891318843932
2021	49.73994815530599
2022	49.84338005276116
2023	49.871069692492036