Year	% (modeled ILO estimate)
1991	48.322
1992	50.262
1993	49.809
1994	49.57
1995	49.474
1996	48.319
1997	46.731
1998	44.987
1999	43.427
2000	41.65
2001	38.594
2002	38.534
2003	38.67
2004	34.816
2005	38.627
2006	37.686
2007	32.983
2008	29.808
2009	32.299
2010	35.569
2011	27.411
2012	27.225
2013	28.469
2014	29.228
2015	30.648
2016	33.386
2017	35.281
2018	37.325
2019	40.517
2020	37.518
2021	39.159
2022	39.245
2023	39.21