Year	% of total labor force
1991	0.6178827629245627
1992	0.598261452219849
1993	0.5789818026019442
1994	0.5600891661952583
1995	0.8662461763352373
1996	0.8367106811347889
1997	0.8176656151419558
1998	0.778596385366281
1999	0.7490461365604738
2000	0.7165569438846343
2001	0.6816167950378298
2002	0.92982264643696
2003	0.4977581737635495
2004	0.36225452727595464
2005	0.3427063520622355
2007	0.3083212831098518
2008	0.2930969799287188
2009	0.3683734637152138
2010	0.3514068252789292
2011	0.3359556538536913
2012	0.3220627632009135
2013	0.3092211141798964
2014	0.29735489306487295
2015	0.28649812473954717
2016	0.3036235905060044
2017	0.20246070743820394
2018	0.28406809014166184
2019	0.18955836691675734
2020	0.19359622409924518