Year	Percent of total labor force
1981	10.76
1982	13.65
1983	14.945
1984	17.037
1985	18.631
1986	17.735
1987	17.934
1988	17.137
1989	15.244
1990	14.945
1991	17.236
1992	22.915
1993	24.41
1994	21.75
1995	19.625
1996	15.75
1997	14.55
1998	12.15
1999	10.35
2000	9.75
2001	9.85
2002	10.3
2003	11
2004	9.575
2005	9.075
2006	8.725
2007	7.425
2008	8.125
2009	9.975
2010	10.25
2011	11.15
2012	11.5
2013	11.625
2014	12.275
2015	11.3
2016	9.65
2017	9.88
2018	10.118
2019	10.425
2020	10.506
2021	10.295
2022	9.976
2023	9.656
2024	9.337