Year	% of total labor force
1991	27.507062400713068
1992	27.936546122223717
1993	28.434086044744383
1994	28.687452680845205
1995	28.8714481970647
1996	29.283232582893177
1997	29.81592903988534
1998	29.93867918360943
1999	30.25244352385268
2000	30.20678750332117
2001	29.484955169444305
2002	30.830180642898302
2003	30.554054305894628
2004	28.996120730438076
2005	30.948880762958936
2006	31.174017377924052
2007	32.67185504374709
2008	33.678441644249375
2009	34.04557657925235
2010	34.306170223672744
2011	34.96001822657635
2012	36.97830117604313
2013	37.73089621561675
2014	38.25126244198604
2015	38.35329481940726
2016	38.851932535315655
2017	39.16223916223916
2018	39.77937389457378
2019	40.09534137634992
2020	40.66131348740044
2021	40.66078733915604
2022	41.619681518722814
2023	41.709934675146876