Year	% (modeled ILO estimate)
1991	46.16
1992	42.085
1993	41.09
1994	38.99
1995	38.731
1996	38.662
1997	38.302
1998	38.411
1999	38.091
2000	38.062
2001	36.282
2002	35.272
2003	34.632
2004	36.715
2005	33.852
2006	32.35
2007	30.82
2008	30.749
2009	28.849
2010	28.079
2011	27.109
2012	28.559
2013	27.14
2014	27.139
2015	26.188
2016	26.609
2017	26.178
2018	26.078
2019	26.078
2020	23.825
2021	24.916
2022	25.996
2023	26.392