Year	% (modeled ILO estimate)
1991	40.586
1992	40.809
1993	41.232
1994	40.977
1995	41.519
1996	41.504
1997	41.701
1998	41.935
1999	42.009
2000	41.938
2001	41.918
2002	42.253
2003	42.678
2004	42.817
2005	42.892
2006	42.938
2007	42.643
2008	42.212
2009	41.406
2010	40.426
2011	40.014
2012	39.702
2013	39.342
2014	38.847
2015	38.31
2016	38.304
2017	38.154
2018	38.094
2019	37.778
2020	35.193
2021	35.905
2022	37.827
2023	37.74