Year	% (modeled ILO estimate)
1991	30.978
1992	31.462
1993	31.954
1994	32.444
1995	32.938
1996	33.455
1997	33.985
1998	34.516
1999	35.043
2000	35.565
2001	36.082
2002	35.372
2003	34.661
2004	33.948
2005	33.232
2006	32.518
2007	31.8
2008	31.081
2009	30.364
2010	29.66
2011	28.968
2012	28.452
2013	27.921
2014	27.401
2015	26.645
2016	25.928
2017	25.254
2018	23.912
2019	24.176
2020	20.924
2021	24.349
2022	24.297
2023	24.326