Year	% of total labor force
1991	0.6047923747777388
1992	0.5793239289748864
1993	0.5821941734007126
1994	0.5764353239566521
1995	0.8270956536123402
1996	0.8145549330028568
1997	0.7790392612874769
1998	0.7681749631445468
1999	0.7661409480446989
2000	0.7413722800904474
2001	0.7787959814127359
2002	0.7568609444615438
2003	0.7549942872098935
2004	0.7379353428080587
2005	0.7181771978739675
2006	0.7036747458952306
2007	0.6897684348825751
2008	0.7187380173174842
2009	0.6357241663478236
2010	0.627820938160468
2011	0.6121762256700491
2012	0.5837801893612826
2013	0.5632415858794215
2014	0.5426950018149733
2015	0.5262234695667427
2016	0.5230417317563044
2017	0.6746955436359342
2018	0.6220737975968307
2019	0.3166851927504426
2020	0.3105194680180474