Year	% of total labor force
1991	35.88342732227921
1992	36.83791646769888
1993	37.92908525415967
1994	38.108892056326155
1995	38.296652259629965
1996	38.23043530135188
1997	38.583507239517225
1998	38.57558583194661
1999	40.5825553614145
2000	39.93143630417622
2001	40.53534977277807
2002	41.14596220305646
2003	41.53847159659251
2004	41.02628225653153
2005	41.63180740799126
2006	42.44641812476733
2007	42.43507471078817
2008	42.69550751236879
2009	42.71370668458117
2010	42.75268793202822
2011	43.16136685619924
2012	42.940366964806756
2013	42.71895607612113
2014	42.49954402191422
2015	42.282616670766814
2016	42.023717205865694
2017	41.63556396798227
2018	41.254208303902786
2019	40.96734379660739
2020	41.01750762699004
2021	41.131644956084514
2022	41.00612885252632
2023	41.24621367029646