Year	% of total labor force
1991	38.06428596943022
1992	38.05575957756902
1993	38.170018393711466
1994	38.28050783915485
1995	38.232693997299364
1996	38.27831897701198
1997	38.33215322896727
1998	38.455746743535435
1999	38.49078329013912
2000	38.539324526324094
2001	38.52445689055324
2002	38.53046604586174
2003	38.60612577066282
2004	38.6808019864653
2005	38.78002845354075
2006	38.82487452866448
2007	38.874721126366104
2008	38.95409855637671
2009	39.06058180036014
2010	39.15853298041171
2011	39.254195992791765
2012	39.313048856448916
2013	39.4653269663974
2014	39.611186203581696
2015	39.78592767416309
2016	39.811021056934536
2017	39.9053587351599
2018	39.86497279270031
2019	39.966732309817914
2020	39.9542790836559
2021	40.15099898295712
2022	39.91563889544111
2023	39.98964209458193