Year	% (modeled ILO estimate)
1991	27.855
1992	27.586
1993	27.089
1994	26.92
1995	26.665
1996	26.088
1997	25.433
1998	24.664
1999	23.967
2000	23.227
2001	23.086
2002	22.924
2003	22.805
2004	22.626
2005	22.439
2006	22.459
2007	22.588
2008	22.77
2009	22.896
2010	22.986
2011	23.063
2012	22.949
2013	22.757
2014	22.493
2015	22.162
2016	20.898
2017	19.627
2018	19.202
2019	18.746
2020	18.283
2021	18.338
2022	18.66
2023	18.86