Year	% of total labor force (modeled ILO estimate)
1991	2.27
1992	2.6
1993	4.349
1994	4.284
1995	4.083
1996	3.852
1997	4.674
1998	6.455
1999	8.702
2000	8.764
2001	8.128
2002	7.281
2003	7.777
2004	8.298
2005	7.927
2006	7.141
2007	5.316
2008	4.393
2009	6.662
2010	7.281
2011	6.712
2012	6.979
2013	6.953
2014	6.108
2015	5.048
2016	3.952
2017	2.893
2018	2.246
2019	2.015
2020	2.551
2021	2.803
2022	2.224
2023	2.593