Year	% (modeled ILO estimate)
1991	40.576
1992	37.643
1993	34.057
1994	34.321
1995	32.851
1996	29.165
1997	25.908
1998	24.506
1999	20.911
2000	17.969
2001	20.953
2002	19.561
2003	19.562
2004	19.564
2005	19.448
2006	21.154
2007	21.968
2008	23.345
2009	21.609
2010	21.331
2011	19.011
2012	18.791
2013	18.423
2014	17.332
2015	16.521
2016	16.313
2017	19.176
2018	17.047
2019	18.413
2020	15.757
2021	13.129
2022	16.118
2023	17.674