Year	Percent of total labor force (Units)
1980	7.824
1981	8.290
1982	7.457
1983	7.945
1984	10.503
1985	8.674
1986	8.603
1987	7.126
1988	7.069
1989	5.059
1990	4.225
1991	4.138
1992	3.860
1993	5.127
1994	6.340
1995	7.917
1996	8.015
1997	7.510
1998	5.720
1999	5.169
2000	4.717
2001	4.801
2002	5.779
2003	7.038
2004	7.392
2005	8.343
2006	8.408
2007	8.722
2008	8.315
2009	10.177
2010	11.506
2011	13.445
2012	16.516
2013	17.092
2014	14.535
2015	12.939
2016	11.452
2017	9.208
2018	7.175
2019	6.675
2020	7.150
2021	6.692
2022	6.142
2023	6.583
2024	6.484
2025	6.344
2026	6.251
2027	6.157
2028	6.157
2029	6.157