Year	% (modeled ILO estimate)
1991	36.386
1992	34.941
1993	35.289
1994	33.577
1995	33.886
1996	30.694
1997	30.149
1998	27.915
1999	28.167
2000	29.37
2001	29.158
2002	25.332
2003	28.906
2004	23.274
2005	24.369
2006	21.611
2007	21.499
2008	22.837
2009	21.854
2010	23.302
2011	24.161
2012	25.893
2013	24.063
2014	25.722
2015	26.931
2016	25.636
2017	28.493
2018	28.459
2019	26.656
2020	26.919
2021	26.923
2022	25.517
2023	25.361