Year	% of total labor force
1991	35.28151073004125
1992	35.70273346512115
1993	36.135336743884
1994	36.57964235384682
1995	37.11125627901066
1996	37.27676977865364
1997	37.716681000559085
1998	37.999185178333484
1999	38.214180547901684
2000	38.41035064641078
2001	38.79309661014994
2002	39.09305043427481
2003	39.36612510417889
2004	39.773677849323576
2005	40.11522588879925
2006	40.276599096688166
2007	40.40199550959912
2008	40.4433432132311
2009	40.786337769499994
2010	40.6996735223919
2011	40.60030639136926
2012	40.7806777754314
2013	40.80407311346469
2014	40.75989885676874
2015	40.92922531509048
2016	41.11292085702273
2017	41.254678947648394
2018	41.47826696788385
2019	41.748038209677816
2020	41.14049076044388
2021	41.52348190957639
2022	41.72811340897086
2023	41.86555233512079