Year	% (modeled ILO estimate)
1991	34.318
1992	33.858
1993	33.807
1994	33.691
1995	33.017
1996	33.259
1997	33.482
1998	33.59
1999	33.596
2000	33.523
2001	33.399
2002	33.25
2003	33.097
2004	32.385
2005	31.661
2006	30.939
2007	30.239
2008	29.566
2009	28.916
2010	28.291
2011	27.699
2012	27.145
2013	26.62
2014	26.18
2015	25.911
2016	25.522
2017	25.955
2018	26.067
2019	26.157
2020	24.176
2021	24.416
2022	24.106
2023	24.427