Year	% of total labor force
1991	37.817005226855485
1992	37.85913026622991
1993	38.01504615713144
1994	38.11070918376381
1995	38.21503115586301
1996	38.33341917623908
1997	38.52495336758771
1998	38.558058794671496
1999	38.77524080939554
2000	38.97883776771914
2001	38.958774573515605
2002	39.154622223502656
2003	39.336576665731805
2004	39.35314723165367
2005	39.504862377490454
2006	39.552117472376494
2007	39.512518560411785
2008	39.63049961211876
2009	39.743239374300515
2010	39.93073551722122
2011	40.0038803869355
2012	40.14646329930406
2013	40.06755948257194
2014	40.135497056321206
2015	40.30171750314713
2016	40.14711031322695
2017	40.122218440463385
2018	40.103360181215585
2019	40.242580284048415
2020	40.29601650194793
2021	40.61320649007887
2022	40.58827590808479
2023	40.80341062940304