Year	% (modeled ILO estimate)
1991	34.426
1992	35.466
1993	35.642
1994	35.556
1995	35.875
1996	33.04
1997	34.011
1998	33.052
1999	31.71
2000	30.974
2001	29.86
2002	25.672
2003	23.164
2004	25.686
2005	21.538
2006	20.593
2007	20.23
2008	20.148
2009	20.569
2010	19.952
2011	19.75
2012	19.626
2013	18.643
2014	18.057
2015	19.306
2016	17.055
2017	20.335
2018	20.202
2019	19.206
2020	19.699
2021	16.106
2022	14.376
2023	14.87