Year	% (modeled ILO estimate)
1991	69.291
1992	70.363
1993	71.556
1994	73.296
1995	73.784
1996	73.268
1997	72.552
1998	72.439
1999	72.192
2000	71.781
2001	71.374
2002	71.373
2003	70.852
2004	70.354
2005	70.383
2006	70.157
2007	69.548
2008	68.975
2009	68.789
2010	68.824
2011	68.021
2012	65.494
2013	63.68
2014	62.701
2015	63.018
2016	62.612
2017	60.965
2018	61.776
2019	61.519
2020	61.743
2021	62.297
2022	63.054
2023	63.12