Year	% of total labor force
1991	35.2575278549402
1992	35.90963433917149
1993	36.453735568533595
1994	37.02314375757832
1995	37.573448082937354
1996	38.11410638773659
1997	38.65378688179724
1998	39.19409821079995
1999	39.73641108565366
2000	40.27698532081539
2001	41.4684096981862
2002	41.971989966555185
2003	42.267104549539006
2004	42.08239210208204
2005	41.959734504020275
2006	42.57818631026352
2007	43.14875903794337
2008	43.376761933887515
2009	44.284199798214665
2010	44.81700548403665
2011	44.920841295169055
2012	44.70335194259201
2013	44.90537740184972
2014	45.8521159500315
2015	46.26550473069333
2016	45.96170980007757
2017	46.068966619006154
2018	45.97162623697347
2019	45.63614528601589
2020	45.13258884057328
2021	45.34443172212864
2022	45.80978507637884
2023	46.27804438029948