Year	Percent of total labor force (Units)
1980	4.780
1981	5.115
1982	5.048
1983	4.562
1984	5.893
1985	6.693
1986	7.078
1987	6.057
1988	6.428
1989	8.881
1990	9.567
1991	10.585
1992	11.155
1993	10.015
1994	7.828
1995	6.863
1996	8.325
1997	9.525
1998	10.675
1999	11.075
2000	10.900
2001	11.625
2002	12.875
2003	13.400
2004	12.900
2005	11.200
2006	10.450
2007	9.150
2008	7.650
2009	9.425
2010	8.250
2011	7.050
2012	6.883
2013	6.217
2014	5.883
2015	5.242
2016	4.825
2017	4.217
2018	3.983
2019	3.808
2020	4.300
2021	4.967
2022	3.758
2023	3.467
2024	3.700
2025	3.800
2026	4.000
2027	4.000
2028	4.000
2029	4.000