Year	% of total labor force
1991	35.50070760707849
1992	37.44228485357588
1993	36.53675974010852
1994	37.357044039658746
1995	36.27464301960808
1996	37.376434925788224
1997	38.31154696575664
1998	38.530187581547985
1999	39.87599461512362
2000	39.59245706660171
2001	40.3239791282677
2002	40.65453334477034
2003	41.1939982987462
2004	42.12722551928783
2005	42.50212555751355
2006	42.87110465765665
2007	43.24556121238663
2008	43.5973461980899
2009	43.509264670638544
2010	43.66469711376763
2011	44.06168790364103
2012	44.47129231923111
2013	44.41738066552029
2014	44.633608993642206
2015	45.57656551482196
2016	45.461043851818786
2017	46.34078871909051
2018	46.52751858036211
2019	45.923469856319926
2020	46.744048118096764
2021	46.78341340166898
2022	46.937980262555826
2023	46.144249977976884