Year	% (modeled ILO estimate)
1991	61.342
1992	61.265
1993	61.315
1994	61.276
1995	61.395
1996	61.48
1997	61.394
1998	61.403
1999	61.275
2000	61.422
2001	61.324
2002	61.574
2003	61.53
2004	63.275
2005	62.205
2006	61.288
2007	60.434
2008	59.567
2009	58.673
2010	57.753
2011	56.869
2012	56.1
2013	55.355
2014	54.431
2015	54.041
2016	53.89
2017	53.896
2018	54.096
2019	53.764
2020	52.949
2021	52.804
2022	53.897
2023	53.954