Year	Percent of total labor force (Units)
1980	11.011
1981	13.755
1982	15.770
1983	17.215
1984	19.937
1985	21.305
1986	20.907
1987	20.223
1988	19.238
1989	17.240
1990	16.238
1991	16.313
1992	18.353
1993	22.640
1994	24.118
1995	22.900
1996	22.080
1997	20.610
1998	18.605
1999	15.640
2000	13.857
2001	10.540
2002	11.450
2003	11.485
2004	10.965
2005	9.153
2006	8.453
2007	8.233
2008	11.245
2009	17.855
2010	19.858
2011	21.390
2012	24.788
2013	26.095
2014	24.443
2015	22.058
2016	19.635
2017	17.225
2018	15.255
2019	14.105
2020	15.533
2021	14.785
2022	12.918
2023	12.115
2024	11.642
2025	11.340
2026	11.040
2027	11.040
2028	11.040
2029	11.040