Year	% (modeled ILO estimate)
1991	37.818
1992	35.895
1993	29.411
1994	27.928
1995	28.405
1996	27.978
1997	29.572
1998	31.883
1999	35.745
2000	37.517
2001	39.629
2002	40.381
2003	39.851
2004	40.076
2005	43.753
2006	44.367
2007	44.219
2008	39.329
2009	29.373
2010	25.584
2011	22.082
2012	18.504
2013	17.335
2014	17.389
2015	18.561
2016	19.411
2017	21.209
2018	22.724
2019	24.265
2020	20.243
2021	21.779
2022	24.504
2023	25.256