Year	% of total labor force (modeled ILO estimate)
1991	17.55
1992	18.481
1993	19.422
1994	20.251
1995	21.063
1996	21.84
1997	22.727
1998	23.633
1999	24.572
2000	25.473
2001	26.461
2002	27.414
2003	28.415
2004	29.288
2005	30.213
2006	31.11
2007	28.984
2008	23.405
2009	24.068
2010	27.312
2011	27.582
2012	28.01
2013	27.49
2014	27.517
2015	27.695
2016	25.408
2017	20.527
2018	18.4
2019	15.692
2020	15.868
2021	14.897
2022	12.657
2023	10.42