Year	% (modeled ILO estimate)
1991	38.1
1992	37.403
1993	36.744
1994	36.124
1995	35.5
1996	34.66
1997	34.301
1998	33.928
1999	33.761
2000	33.739
2001	33.762
2002	33.948
2003	34.142
2004	34.076
2005	33.68
2006	33.261
2007	32.898
2008	35.368
2009	37.862
2010	37.894
2011	37.835
2012	37.749
2013	37.674
2014	37.649
2015	37.596
2016	37.572
2017	37.558
2018	37.56
2019	37.496
2020	31.314
2021	32.595
2022	33.502
2023	33.586