Year	% of total labor force
1991	40.37544519778022
1992	40.079076737928446
1993	39.87546870295864
1994	40.089118758703
1995	40.338959491148906
1996	40.598520057639334
1997	40.85389187330159
1998	41.11012748291109
1999	41.3653978750566
2000	41.616514335850866
2001	41.86357842415081
2002	42.10812520805636
2003	42.311285201103345
2004	42.474749832703054
2005	42.62972410045883
2006	42.777470071783846
2007	42.911798744987564
2008	43.036962455350874
2009	43.15785637131137
2010	43.276580736180584
2011	43.3912833064989
2012	43.509853011104795
2013	44.07784752688203
2014	44.64495727307519
2015	45.21331461833126
2016	45.78044433914738
2017	46.34914569984239
2018	46.91399220747389
2019	46.94807516773471
2020	46.9168842246601
2021	47.17340729541817
2022	46.92779542481916
2023	47.00415035384295