Year	% (modeled ILO estimate)
1991	60.062
1992	59.336
1993	57.877
1994	56.652
1995	57.008
1996	56.863
1997	56.308
1998	56.44
1999	56.657
2000	57.542
2001	58.332
2002	58.054
2003	58.266
2004	57.845
2005	57.076
2006	56.852
2007	57.064
2008	57.403
2009	56.266
2010	56.079
2011	55.858
2012	55.492
2013	55.4
2014	54.575
2015	54.332
2016	54.428
2017	54.679
2018	54.802
2019	54.613
2020	54.064
2021	55.079
2022	55.684
2023	55.713