Year	% of total labor force
1991	39.43407559088992
1992	39.45881681647619
1993	39.4430065903199
1994	39.545484092086035
1995	39.5610741107105
1996	39.57127865415014
1997	39.58806580346287
1998	39.61610633367052
1999	39.65872868999586
2000	39.66415378939549
2001	39.664860194856175
2002	39.67338854190433
2003	39.71302779655368
2004	39.721850118882315
2005	39.790478856352095
2006	39.73832244751587
2007	39.72869647552174
2008	39.63473323833514
2009	39.61441070629481
2010	39.5023079269117
2011	39.45556116591173
2012	39.426695212929744
2013	39.43332714419567
2014	39.462503030032686
2015	39.519390408288224
2016	39.57732751060471
2017	39.63683365215807
2018	39.65564009570725
2019	39.73595265588071
2020	39.59206542892437
2021	39.823237681243796
2022	39.73349504814771
2023	40.08679441231539