Year	% of total labor force
1991	0.6419579015680114
1992	0.6390541069683622
1993	0.6325339828882307
1994	0.5601908234020837
1995	0.5519653518779118
1996	0.5238558764740412
1997	0.5011944697519953
1998	0.4996058084014341
1999	0.4948636476695453
2000	0.4733552448790166
2001	0.46561390687519416
2002	0.4267944499061052
2003	0.41357467499522704
2004	0.3742725078129386
2005	0.41008368441053206
2006	0.40067277410692265
2007	0.39476108182081354
2008	0.3911419388905911
2009	0.4172034644320353
2010	0.4133764216892493
2011	0.36023160996564946
2012	0.3592160770831486
2013	0.3548424937662523
2014	0.3434489139943311
2015	0.35301263745799344
2016	0.34054326488665965
2017	0.32846091971977176
2018	0.3363770686742414
2019	0.31754958977885495
2020	0.3455901487454559