Year	% (modeled ILO estimate)
1991	70.13
1992	67.908
1993	66.016
1994	64.635
1995	63.655
1996	64.394
1997	64.313
1998	63.852
1999	63.017
2000	63.417
2001	61.896
2002	62.396
2003	61.187
2004	61.567
2005	62.226
2006	62.317
2007	61.397
2008	61.245
2009	59.226
2010	58.444
2011	58.214
2012	58.644
2013	58.324
2014	57.813
2015	58.524
2016	58.344
2017	57.484
2018	57.091
2019	56.642
2020	54.667
2021	51.22
2022	54.355
2023	55.029