Year	% (modeled ILO estimate)
1991	38.799
1992	38.774
1993	38.69
1994	38.564
1995	38.424
1996	38.29
1997	38.205
1998	38.18
1999	38.205
2000	38.266
2001	38.444
2002	38.65
2003	38.858
2004	39.051
2005	39.227
2006	38.991
2007	38.778
2008	38.602
2009	38.477
2010	38.406
2011	38.573
2012	38.787
2013	38.887
2014	38.987
2015	39.087
2016	39.186
2017	39.286
2018	37.678
2019	36.061
2020	33.988
2021	33.648
2022	34.366
2023	33.994