Year	% of total labor force
1991	34.756623190451585
1992	33.892413852428
1993	32.747619655251356
1994	32.80903720693474
1995	32.99340092340597
1996	33.596132549044036
1997	33.80046205066224
1998	33.79409849000263
1999	34.23190932021723
2000	34.69113473683613
2001	34.940426531245095
2002	35.11892949190084
2003	35.483184510061896
2004	35.95690928624185
2005	36.750297940672894
2006	37.55575625741579
2007	37.99788038487579
2008	38.1943316768972
2009	38.39889915235586
2010	38.35856209007022
2011	37.76096186619408
2012	37.885138405513175
2013	37.98871072542203
2014	37.9560854146805
2015	38.15655474953454
2016	38.04564942208291
2017	38.03138080772943
2018	38.053602353911344
2019	37.899668785461884
2020	37.878791503253126
2021	38.0859083525687
2022	37.45616869358871
2023	37.66897375069726