Year	% of total labor force
1991	39.58368941958149
1992	39.50342459849091
1993	39.500289349240646
1994	39.5653910984099
1995	39.65403743264861
1996	39.65386279913521
1997	39.65771774980827
1998	39.7697307294414
1999	39.785574237818864
2000	39.83925114336662
2001	39.86186869105708
2002	39.884334384283804
2003	39.8979677053923
2004	39.91906766025306
2005	39.94729019204807
2006	39.902639131019406
2007	39.951401754240706
2008	40.030607984222264
2009	40.107942105849254
2010	40.181424168855834
2011	40.27779076857637
2012	40.362052578551946
2013	40.568667826887435
2014	40.74629143618364
2015	41.01152878552346
2016	41.14843804972759
2017	41.37170443542654
2018	41.41705589523713
2019	41.410193608361304
2020	41.37337680929064
2021	41.60044223398114
2022	41.29217883884525
2023	41.372478187933794