Year	% of total labor force
1991	17.821139041191813
1992	18.127911898361297
1993	18.05931733990505
1994	18.38938944002478
1995	18.37111602418911
1996	18.384166306783477
1997	18.4603230010708
1998	18.588235386063293
1999	19.05929981213971
2000	19.40237403792817
2001	19.683850242433092
2002	19.50914310725199
2003	19.861142104905316
2004	20.17898760482175
2005	20.51511185505992
2006	20.578583000811552
2007	20.773561203543025
2008	20.096675062965677
2009	20.341380349534898
2010	20.20106251038068
2011	20.05154305834629
2012	20.303583368575172
2013	20.149787738115897
2014	20.1913209746234
2015	20.67353271678862
2016	21.132876496790484
2017	20.862212511714162
2018	20.204810593730937
2019	19.7605690663389
2020	19.390072976453165
2021	19.66781466347151
2022	19.5685761218323
2023	19.86342107701675