Year	% (modeled ILO estimate)
1991	31.739
1992	30.719
1993	30.523
1994	32.656
1995	28.274
1996	29.341
1997	29.855
1998	36.414
1999	34.841
2000	33.074
2001	31.856
2002	29.707
2003	29.484
2004	28.566
2005	28.176
2006	29.703
2007	29.286
2008	29.631
2009	28.083
2010	28.287
2011	28.067
2012	27.772
2013	26.965
2014	25.437
2015	26.968
2016	25.986
2017	27.072
2018	23.767
2019	24.288
2020	21.588
2021	22.86
2022	23.272
2023	22.715