Year	% of total labor force
1991	30.765787315573572
1992	30.815518268507283
1993	30.902456036627388
1994	31.028468501230204
1995	30.96282372853111
1996	31.014002979831215
1997	31.0521911000055
1998	31.159444774623573
1999	31.210549643609443
2000	31.25154310501907
2001	31.38222941320736
2002	31.45534982632945
2003	31.605570521316594
2004	31.738681817125094
2005	31.959729409193173
2006	31.926832025946105
2007	31.906474260861888
2008	31.79508516544524
2009	31.791593939661983
2010	31.720935806926637
2011	31.574604898877283
2012	31.410446984623867
2013	31.554512554634734
2014	31.67724405396464
2015	31.770789192512773
2016	31.818400769341807
2017	31.86926866521207
2018	31.80868367306468
2019	31.876032092543348
2020	31.770331690303806
2021	32.08481997315769
2022	32.27185589979511
2023	33.51329092426197