Year	% (modeled ILO estimate)
1991	35.13
1992	35.234
1993	35.382
1994	35.586
1995	35.793
1996	35.987
1997	35.628
1998	35.256
1999	34.88
2000	34.505
2001	34.124
2002	33.737
2003	33.34
2004	32.933
2005	32.519
2006	32.108
2007	31.7
2008	31.297
2009	30.902
2010	30.52
2011	30.148
2012	29.743
2013	29.301
2014	28.83
2015	28.34
2016	27.899
2017	27.44
2018	26.969
2019	26.493
2020	26.242
2021	26.201
2022	26.828
2023	26.389