Year	Percent of total labor force (Units)
1980	1.230
1981	1.360
1982	2.140
1983	2.710
1984	2.450
1985	2.910
1986	2.660
1987	1.970
1988	1.690
1989	1.570
1990	1.670
1991	1.510
1992	1.510
1993	1.450
1994	1.560
1995	1.790
1996	2.600
1997	2.720
1998	2.690
1999	2.920
2000	2.990
2001	4.570
2002	5.170
2003	4.990
2004	4.440
2005	4.130
2006	3.910
2007	3.910
2008	4.140
2009	5.850
2010	5.210
2011	4.390
2012	4.240
2013	4.180
2014	3.960
2015	3.780
2016	3.920
2017	3.760
2018	3.710
2019	3.730
2020	3.850
2021	3.950
2022	3.670
2023	3.670
2024	3.670
2025	3.670
2026	3.670
2027	3.670
2028	3.670
2029	3.670