Year	% of total labor force
1991	20.6628251456848
1992	22.03788865694599
1993	23.46198052144456
1994	24.93923825879408
1995	26.398313367401077
1996	27.695880050421284
1997	28.9767213238723
1998	30.268245095340124
1999	31.56985532282444
2000	32.908759792670175
2001	33.146978136170915
2002	33.39014828702915
2003	33.62649283728679
2004	33.86193330835519
2005	34.09336199312528
2006	33.86241543538262
2007	33.09176346007479
2008	32.2612101099385
2009	31.512964407898686
2010	30.711203115680153
2011	29.99947294216858
2012	29.36549326379835
2013	28.797858476277693
2014	28.501303118650057
2015	28.444924629350094
2016	28.408963939236425
2017	28.12029599359916
2018	27.497061782884778
2019	26.72115787165328
2020	26.716343351927403
2021	26.838766533813935
2022	27.00912112812137
2023	27.46252368088352