Year	% (modeled ILO estimate)
1991	29.9
1992	29.649
1993	29.264
1994	28.994
1995	27.964
1996	27.3
1997	26.554
1998	26.157
1999	25.644
2000	25.127
2001	24.797
2002	23.993
2003	23.287
2004	22.739
2005	22.95
2006	22.143
2007	22.375
2008	22.031
2009	20.487
2010	22.057
2011	18.486
2012	21.745
2013	21.731
2014	19.582
2015	18.763
2016	20.086
2017	19.577
2018	19.435
2019	18.315
2020	15.937
2021	16.43
2022	16.649
2023	16.953