Year	Percent of total labor force
1986	9.551
1987	11.908
1988	12.003
1989	7.789
1990	8.172
1991	7.534
1992	6.895
1993	7.534
1994	7.278
1995	6.895
1996	3.742
1997	4.183
1998	4.628
1999	5.071
2000	5.512
2001	5.951
2002	6.388
2003	6.822
2004	7.255
2005	7.3
2006	7.7
2007	8.6
2008	8.8
2009	8.7
2010	7.1
2011	7.1
2012	6.8
2013	6.367
2014	6.2
2015	5.5
2016	5.5
2017	4.5
2018	4.5
2019	4.5
2020	4.5
2021	4.5
2022	4.5
2023	4.5
2024	4.5