Year	% of total labor force
1991	29.169908810073476
1992	29.31200362288374
1993	29.301950634452023
1994	29.578472183613435
1995	29.61400713651736
1996	29.71558059738593
1997	29.80219749290513
1998	29.97131135472887
1999	30.046080103211096
2000	30.062293707114993
2001	30.091144945721414
2002	30.091673506259184
2003	30.25233053765492
2004	30.34817983743051
2005	30.530007298004495
2006	30.521683201502388
2007	30.688624898866173
2008	30.609505832740343
2009	30.664953013004556
2010	30.616038125075452
2011	30.52211594348062
2012	30.48862133592072
2013	30.533555289700377
2014	30.619548124560637
2015	30.819767689513252
2016	30.980192949153267
2017	31.113836684835146
2018	31.191343340677847
2019	31.341355586920454
2020	31.099402236876045
2021	31.45934694445372
2022	31.646988116626737
2023	32.77875240303725