Year	% of total labor force
1991	33.1298165311756
1992	33.41243874085267
1993	33.72351162481893
1994	33.64803715831929
1995	33.929152169466185
1996	33.94501432602087
1997	34.119737357123064
1998	34.22457369515218
1999	34.076230425885896
2000	33.546792403576326
2001	33.50088829589602
2002	33.461396503056555
2003	33.42710110972004
2004	33.4012885100396
2005	33.38166015265929
2006	31.9425487223103
2007	31.89362405863801
2008	32.90305872737554
2009	33.44307843880795
2010	34.23737526635252
2011	33.01171930880373
2012	32.586011416180284
2013	34.43195850212233
2014	35.64754748828538
2015	36.109006318459976
2016	36.047577570215445
2017	35.352433916237835
2018	37.52774554226698
2019	36.27587307454405
2020	39.24380707141111
2021	39.43414485591643
2022	39.54451069094711
2023	39.60012403896535