Year	% of total labor force
1991	29.399258908327973
1992	29.1791153674573
1993	29.523487896240518
1994	30.264179788086327
1995	30.50656003269071
1996	30.272586635252075
1997	31.76257766250413
1998	32.869831265505475
1999	33.27735878763776
2000	32.636914480785904
2001	34.332017206466446
2002	34.24753114777881
2003	34.349443334109544
2004	33.653577454428685
2005	35.458913698350464
2006	35.54731433851714
2007	35.90842051072068
2008	36.343074358394276
2009	36.934190961004745
2010	37.13743869759876
2011	38.246042092979756
2012	39.91164864811319
2013	40.198232466396114
2014	39.94646353261353
2015	39.817039585545174
2016	38.51416616512343
2017	38.32785990888236
2018	39.11106015719554
2019	41.064709562838345
2020	40.16292040380422
2021	40.757387577505654
2022	40.993078905667105
2023	39.07364564858927