Year	% (modeled ILO estimate)
1991	28.278
1992	28.943
1993	28.979
1994	29.475
1995	29.613
1996	29.548
1997	29.718
1998	29.687
1999	29.501
2000	29.442
2001	29.396
2002	29.437
2003	29.404
2004	29.327
2005	29.027
2006	28.726
2007	28.377
2008	27.84
2009	27.627
2010	27.256
2011	26.59
2012	26.063
2013	25.561
2014	25.026
2015	24.701
2016	24.388
2017	24.047
2018	23.715
2019	23.37
2020	22.273
2021	22.243
2022	23.397
2023	23.765