Year	% of total labor force (modeled ILO estimate)
1991	1.4
1992	1.5
1993	1.5
1994	4.7
1995	8.3
1996	10.3
1997	11
1998	12.2
1999	12.7
2000	11.75
2001	10.898
2002	10.1
2003	9.239
2004	8.367
2005	7.46
2006	6.577
2007	5.705
2008	4.846
2009	4
2010	4
2011	4.002
2012	3.997
2013	3.999
2014	4.011
2015	4.023
2016	4.034
2017	4.045
2018	4.051
2019	4.055
2020	4.489
2021	4.452
2022	4.121
2023	4.12