Year	% (modeled ILO estimate)
1991	37.762
1992	37.524
1993	37.589
1994	37.647
1995	37.593
1996	37.581
1997	37.523
1998	37.382
1999	37.273
2000	37.122
2001	37.172
2002	37.13
2003	37.428
2004	37.714
2005	37.976
2006	38.383
2007	38.259
2008	38.119
2009	37.907
2010	37.673
2011	37.535
2012	37.365
2013	37.156
2014	36.887
2015	36.584
2016	36.338
2017	36.106
2018	35.925
2019	31.977
2020	29.79
2021	30.242
2022	32.831
2023	34.769