Year	% of total labor force
1991	30.501587056792555
1992	31.248265067732895
1993	31.657963290374763
1994	31.95673119425684
1995	32.553400766226595
1996	33.00108023175881
1997	33.6726655046315
1998	33.92225579956681
1999	34.199812169088766
2000	34.294504281165786
2001	33.957178968606996
2002	34.009476271985825
2003	34.936486138528885
2004	36.00459179408232
2005	36.617257446642625
2006	36.90969552757371
2007	37.43462162139201
2008	38.347124982161134
2009	38.85307861542955
2010	39.362609682943415
2011	40.195259683204135
2012	40.58118635737139
2013	40.67043594481539
2014	41.06449610140388
2015	41.023705851183614
2016	40.980944350427855
2017	41.220280227875634
2018	41.72405285876788
2019	42.03075984734572
2020	40.866419704302615
2021	41.024245701081554
2022	42.158478615920636
2023	42.77883058411086