Year	% (modeled ILO estimate)
1991	41.959
1992	42.94
1993	34.759
1994	32.669
1995	32.314
1996	30.495
1997	33.123
1998	32.959
1999	32.36
2000	30.268
2001	28.313
2002	28.244
2003	30.869
2004	28.839
2005	32.232
2006	35.261
2007	38.086
2008	36.973
2009	27.392
2010	25.306
2011	25.797
2012	28.641
2013	30.188
2014	32.474
2015	34.536
2016	32.819
2017	32.987
2018	33.107
2019	31.775
2020	29.645
2021	27.871
2022	30.579
2023	30.51