Year	% (modeled ILO estimate)
1991	36.355
1992	35.57
1993	31.648
1994	30.936
1995	31.244
1996	27.496
1997	28.657
1998	33.655
1999	34.945
2000	33.159
2001	30.488
2002	28.677
2003	26.707
2004	23.38
2005	21.87
2006	21.651
2007	21.122
2008	20.248
2009	18.173
2010	18.273
2011	17.995
2012	18.469
2013	20.133
2014	23.522
2015	25.687
2016	28.144
2017	28.988
2018	29.004
2019	28.545
2020	27.234
2021	27.497
2022	27.591
2023	27.22