Year	Percent of total labor force
1981	0.5
1982	0.5
1983	0.5
1984	0.5
1985	0.5
1986	0.5
1987	0.5
1988	0.5
1989	0.5
1990	0.5
1991	0.5
1992	0.5
1993	3.842
1994	7.183
1995	1.5
1996	1.8
1997	0.699
1998	0.711
1999	0.791
2000	0.777
2001	1.097
2002	1.305
2003	1.221
2004	1.42
2005	1.349
2006	1.37
2007	1.701
2008	1.671
2009	1.639
2010	2.072
2011	2.078
2012	1.986
2013	1.902
2014	1.722
2015	1.322
2016	1.322
2017	1.322
2018	1.322
2019	1.322
2020	1.322
2021	1.322
2022	1.322
2023	1.322
2024	1.322