Year	% (modeled ILO estimate)
1991	25.725
1992	24.925
1993	24.118
1994	23.417
1995	22.739
1996	22.117
1997	21.377
1998	20.656
1999	19.884
2000	19.057
2001	18.204
2002	17.822
2003	17.378
2004	16.949
2005	16.454
2006	15.941
2007	17.924
2008	21.773
2009	21.216
2010	17.404
2011	16.675
2012	13.879
2013	14.46
2014	13.051
2015	15.354
2016	17.929
2017	22.273
2018	25.734
2019	26.746
2020	24.8
2021	26.911
2022	25.21
2023	27.084