Year	% of total labor force
1991	0.6024673777607383
1992	0.8426035580158371
1993	0.9399301390210385
1994	1.0555080877630618
1995	0.8439607886141627
1996	0.6946170738912271
1997	0.6676684235550165
1998	0.6601283008297537
1999	0.6930185511308836
2000	0.6928018884228803
2001	0.6595768715924425
2002	0.6725311709669268
2003	0.662283553693134
2004	0.09623796183394909
2005	2.609559606890195
2006	0.5425560949926083
2007	0.5339825322705378
2008	0.5214955949493832
2009	0.5722501559616203
2010	0.5685447507245928
2011	0.5096187786798447
2012	0.49340181271251404
2013	0.4571408411133326
2014	0.43945939733214345
2015	0.4359714077672832
2016	0.4286835323113818
2017	0.42678676310692637
2018	0.43278007428079823
2019	0.4023330488838677
2020	0.40162150667103363