Year	% of total labor force
1991	39.41496794226733
1992	39.27821309576983
1993	39.25401883382479
1994	39.209149743037635
1995	38.99751870667282
1996	38.73457200536731
1997	37.929351458406146
1998	38.00599180414609
1999	38.18275228470577
2000	39.274845215675185
2001	39.54067419069198
2002	39.72618924190876
2003	40.14260847439004
2004	40.20358513681903
2005	40.26691021471465
2006	39.327666024151966
2007	39.71143920961439
2008	39.04888574299022
2009	38.95455571696698
2010	38.63801953383984
2011	39.658172317206045
2012	39.327480354478766
2013	40.10153492515794
2014	39.650566680734215
2015	39.56427467034614
2016	38.85817792107866
2017	39.09545413946074
2018	39.07276502951995
2019	40.78566677177823
2020	40.558241146397336
2021	40.06276714682695
2022	40.20604016556799
2023	40.97881045485692