Year	% (modeled ILO estimate)
1991	28.293
1992	28.212
1993	27.941
1994	27.767
1995	27.524
1996	27.522
1997	27.469
1998	27.371
1999	27.209
2000	27.087
2001	27.133
2002	27.22
2003	27.213
2004	27.197
2005	27.075
2006	27.142
2007	27.158
2008	27.182
2009	27.201
2010	27.202
2011	27.241
2012	24.818
2013	22.539
2014	22.138
2015	21.718
2016	21.224
2017	20.769
2018	20.385
2019	20.069
2020	19.628
2021	20.177
2022	20.891
2023	20.932