Year	% (modeled ILO estimate)
1991	61.554
1992	61.051
1993	60.42
1994	59.887
1995	59.744
1996	59.451
1997	59.19
1998	59.02
1999	58.8
2000	58.36
2001	58.568
2002	58.652
2003	58.612
2004	58.569
2005	58.635
2006	58.781
2007	58.905
2008	59.01
2009	59.031
2010	58.9
2011	58.793
2012	58.591
2013	58.284
2014	57.881
2015	57.402
2016	56.941
2017	56.421
2018	55.852
2019	55.252
2020	54.203
2021	54.278
2022	55.249
2023	55.55