Year	% (modeled ILO estimate)
1991	27.84146838741562
1992	27.764999974792843
1993	27.55248071870427
1994	27.494665348359753
1995	27.252585405056088
1996	27.302109504796526
1997	27.13849120666148
1998	27.046892488151887
1999	26.768624698411454
2000	26.201272080296686
2001	26.243643559269977
2002	26.28702608351516
2003	25.9911337541382
2004	25.595800362231312
2005	25.32551202813712
2006	24.926371832142333
2007	24.501493574710363
2008	24.052136548595954
2009	23.726906050152813
2010	23.25966264634406
2011	22.600108125728017
2012	21.82100873321642
2013	21.474230821035018
2014	21.217545724761216
2015	20.764224047805904
2016	20.220561341314
2017	19.61967559976474
2018	18.921693963216963
2019	18.84060815130388
2020	17.90499497685738
2021	18.084459450912174
2022	18.735133263730734
2023	19.969141521037802