Year	Percent of total labor force
1990	15
1991	14
1992	12
1993	10
1994	9
1995	12.5
1996	13.8
1997	12.7
1998	14.3
1999	12.8
2000	11.4
2001	9.066
2002	10
2003	12.9
2004	11.6
2005	11
2006	9.372
2007	8.54
2008	8.2
2009	13.054
2010	13.513
2011	13.972
2012	14.431
2013	11.68
2014	11.056
2015	10.114
2016	7.974
2017	8.987
2018	8.717
2019	10.089
2020	10.55
2021	11.277
2022	12.082
2023	12.862
2024	13.656