Year	Percent of total labor force
1986	12.2
1987	11.5
1988	11
1989	11.7
1990	12
1991	12.3
1992	14.8
1993	13.1
1994	13.292
1995	10.9
1996	11.505
1997	9.779
1998	7.743
1999	7.796
2000	7
2001	6.9
2002	9.102
2003	10.835
2004	10.202
2005	10.17
2006	7.628
2007	7.853
2008	8.703
2009	14.246
2010	15.082
2011	15.889
2012	14.367
2013	15.782
2014	14.636
2015	13.379
2016	12.15
2017	10.1
2018	9.2
2019	9.046
2020	9.028
2021	8.914
2022	8.82
2023	8.725
2024	8.628