Year	% (modeled ILO estimate)
1991	38.575
1992	38.221
1993	37.873
1994	37.513
1995	37.142
1996	36.784
1997	34.592
1998	32.894
1999	31.246
2000	31.655
2001	30.186
2002	28.749
2003	29.879
2004	28.681
2005	27.507
2006	29.219
2007	27.646
2008	28.172
2009	26.27
2010	22.973
2011	23.902
2012	26.06
2013	26.438
2014	25.036
2015	25.281
2016	23.109
2017	23.383
2018	22.234
2019	25.773
2020	23.443
2021	21.164
2022	20.442
2023	20.449