Year	% of male labor force (national estimate)
1991	0.02
1992	0.2
1993	0.9
1994	1.6
1995	2.2
1996	3
1997	1.9
1998	1.6
1999	1.6
2000	1.7
2001	1.9
2002	2.3
2003	1.2
2004	1.2
2005	1
2006	0.8
2007	0.7
2008	0.7
2009	7.5
2011	0.6
2012	0.6
2013	0.6
2014	0.7
2015	1.2
2016	7.48
2017	7.229
2018	5.926
2019	5.109
2020	4.775
2021	4.734
2022	4.242