Year	% (modeled ILO estimate)
1991	51.409
1992	51.582
1993	50.849
1994	49.712
1995	50.018
1996	47.111
1997	45.551
1998	43.71
1999	39.439
2000	37.708
2001	36.414
2002	35.859
2003	35.197
2004	34.905
2005	34.726
2006	35.794
2007	36.138
2008	37.56
2009	34.197
2010	36.717
2011	37.629
2012	36.098
2013	35.419
2014	35.131
2015	35.429
2016	33.922
2017	32.144
2018	30.666
2019	27.51
2020	23.56
2021	24.823
2022	27.684
2023	26.925