Year	% of total labor force
1991	19.811923825217765
1992	20.076961243813734
1993	19.91473205434374
1994	20.205585619667115
1995	20.15473736151349
1996	20.16519657950361
1997	20.10474127572556
1998	20.10147713606079
1999	20.43075203681589
2000	20.62547169306236
2001	20.75242322731257
2002	20.339380176078006
2003	20.500139795852913
2004	20.642909333714496
2005	20.787425678376458
2006	20.941311250387603
2007	21.337137236941086
2008	20.908591323795253
2009	21.017958099015118
2010	20.90377674654494
2011	20.940073455987626
2012	20.999750190363706
2013	21.189269420366674
2014	21.297902923910296
2015	21.646701185013487
2016	21.85287285341556
2017	21.40382153216838
2018	20.67980944863515
2019	20.29001966837956
2020	20.39128240485599
2021	20.826204603099146
2022	20.701887760378476
2023	20.862644405375566