Year	% (modeled ILO estimate)
1991	42.363
1992	38.215
1993	36.491
1994	34.951
1995	30.19
1996	33.662
1997	35.893
1998	33.25
1999	30.417
2000	28.006
2001	29.701
2002	29.667
2003	30.336
2004	34.812
2005	35.842
2006	38.69
2007	36.317
2008	37.396
2009	37.977
2010	37.494
2011	35.898
2012	32.658
2013	33.118
2014	32.715
2015	29.232
2016	30.49
2017	28.642
2018	28.406
2019	28.238
2020	24.656
2021	25.499
2022	26.116
2023	26.895