Year	% (modeled ILO estimate)
1991	20.346
1992	20.054
1993	19.843
1994	19.621
1995	19.363
1996	19.087
1997	18.918
1998	18.709
1999	18.561
2000	18.422
2001	18.372
2002	18.378
2003	18.42
2004	18.424
2005	18.514
2006	18.612
2007	18.706
2008	19.455
2009	20.227
2010	21.019
2011	21.831
2012	22.661
2013	23.509
2014	24.374
2015	25.275
2016	26.172
2017	26.996
2018	27.738
2019	28.401
2020	24.487
2021	25.11
2022	25.541
2023	25.654