Year	% of total labor force (modeled ILO estimate)
1991	1.6
1992	1.8
1993	5.3
1994	6.6
1995	6.7
1996	9.3
1997	10.8
1998	9.4
1999	11.2
2000	11.097
2001	10.995
2002	10.872
2003	10.757
2004	10.666
2005	10.577
2006	10.491
2007	10.394
2008	10.657
2009	10.993
2010	11.279
2011	11.534
2012	11.704
2013	11.948
2014	12.201
2015	12.468
2016	12.732
2017	12.968
2018	13.212
2019	12.2
2020	12.18
2021	10.012
2022	8.608
2023	8.586