Year	% of total labor force
1991	12.556267774966571
1992	11.735918364951853
1993	10.88056404844027
1994	10.182967561138536
1995	12.432652437756978
1996	11.959510505691222
1997	12.104744644519634
1998	11.809220089328976
1999	11.531067621966857
2000	12.526710749920078
2001	9.177421544288555
2002	9.028701767724767
2003	9.036918059278912
2004	8.61588879550658
2005	8.316581540335795
2006	7.848494361811348
2007	6.935965417651345
2008	6.77766569866132
2009	6.4590760540130745
2010	6.370730385501256
2011	6.247095524592073
2012	6.562999682930405
2013	6.269330435509487
2014	5.666036452972879
2015	4.975171524961146
2016	4.558833222881948
2017	4.29822890736798
2018	3.7485204423623437
2019	4.155012036998233
2020	3.9689572796493087