Year	Percent of total labor force
1991	10.1
1992	11.6
1993	11
1994	10.5
1995	9.9
1996	11.2
1997	11.6
1998	14.7
1999	14.7
2000	13.9
2001	12.5
2002	13
2003	13.7
2004	12.9
2005	11.4
2006	11.5
2007	10.9
2008	9.4
2009	9.7
2010	8.5
2011	7.8
2012	7.4
2013	7.2
2014	6.792
2015	8.3
2016	11.267
2017	12.767
2018	12.258
2019	11.4
2020	10.2
2021	9.8
2022	9.5
2023	9.25
2024	9