Year	% (modeled ILO estimate)
1991	36.382
1992	36.07
1993	35.885
1994	35.674
1995	35.35
1996	35.416
1997	35.482
1998	35.548
1999	35.614
2000	35.68
2001	31.6
2002	33.945
2003	35.527
2004	35.236
2005	34.945
2006	35.936
2007	34.136
2008	32.173
2009	31.345
2010	33.527
2011	32.618
2012	32.718
2013	32.018
2014	32.691
2015	35.827
2016	35.555
2017	35.664
2018	37.255
2019	34.582
2020	30.926
2021	27.606
2022	26.778
2023	27.048