Year	% of total labor force
1991	2.2581689260901308
1992	6.069434328720563
1993	6.195978809752471
1994	6.079489322896876
1995	9.467491189973476
1996	9.23462544798927
1997	8.835842665899959
1998	8.391161310086709
1999	8.04972943964939
2000	7.786429365962181
2001	7.52027789217354
2002	7.112622302407883
2003	6.986929329766022
2004	6.1954727990582885
2005	7.246013299221332
2007	6.488590894344112
2008	6.914415492545728
2009	6.771100212283142
2010	6.6567629112928515
2011	6.522253728261253
2012	6.3887203319174555
2013	6.255132106458001
2014	6.123481542077066
2015	5.996341999861088
2016	5.929989905437031
2017	5.760572866815555
2018	5.83947310152
2019	5.533162798418367
2020	5.518904370123199