Year	% of total labor force
1991	0.6666638889004629
1992	0.6504308291204386
1993	0.6352110170998806
1994	0.6205160444118846
1995	0.8716542215919363
1996	0.8510307647621461
1997	0.829446056254474
1998	0.807958177274455
1999	0.7866146908159656
2000	0.7639112388282133
2001	0.7377261611809777
2002	0.7120886333625909
2003	0.5829348948415344
2004	0.46161751353765484
2005	0.4450546638390861
2006	0.4282526862149743
2007	0.41180500826955935
2008	0.39580202477473303
2009	0.3923761084327808
2010	0.3775050030852455
2011	0.364187118900252
2012	0.3516041780804841
2013	0.3394018382003557
2014	0.3275385478131839
2015	0.3161956565065017
2016	0.30530492282909233
2017	0.2859955827982237
2018	0.2780998765478374
2019	0.2615422262376219
2020	0.24658046829946087