Year	% (modeled ILO estimate)
1991	29.885
1992	29.561
1993	29.504
1994	29.387
1995	28.712
1996	28.031
1997	27.349
1998	26.531
1999	25.72
2000	24.915
2001	24.112
2002	23.313
2003	22.516
2004	21.726
2005	20.945
2006	20.143
2007	20.847
2008	20.855
2009	19.544
2010	20.43
2011	20.924
2012	23.18
2013	21.661
2014	19.957
2015	18.335
2016	20.847
2017	19.456
2018	19.356
2019	19.298
2020	17.818
2021	18.012
2022	18.094
2023	18.382