Year	Percent of total labor force
1981	22.328
1982	22.219
1983	21.426
1984	20.66
1985	19.923
1986	19.211
1987	18.525
1988	17.863
1989	17.225
1990	16.61
1991	15.998
1992	15.409
1993	15.757
1994	15.177
1995	14.618
1996	14
1997	13.5
1998	13
1999	12.5
2000	15.2
2001	15
2002	15.9
2003	15.8
2004	16.183
2005	17.01
2006	17.493
2007	16.77
2008	16.04
2009	14.894
2010	13.733
2011	12.033
2012	14.8
2013	15.2
2014	19.8
2015	21.6
2016	20.6
2017	19.6
2018	19.5
2019	21.4
2020	20.9
2021	20.6
2022	19.8
2023	19.4
2024	19.1