Year	% (modeled ILO estimate)
1991	21.534
1992	21.162
1993	20.172
1994	19.634
1995	19.165
1996	18.63
1997	17.967
1998	17.278
1999	16.447
2000	16.391
2001	15.55
2002	14.635
2003	13.924
2004	13.249
2005	12.883
2006	12.851
2007	12.667
2008	12.313
2009	11.332
2010	12.199
2011	12.997
2012	13.209
2013	13.169
2014	13.05
2015	12.347
2016	14.111
2017	11.572
2018	13.223
2019	14.919
2020	17.083
2021	20.022
2022	23.065
2023	23.391