Year	% (modeled ILO estimate)
1991	39.986
1992	39.681
1993	39.441
1994	38.971
1995	38.541
1996	38.384
1997	38.144
1998	37.741
1999	37.383
2000	36.946
2001	36.613
2002	36.149
2003	35.248
2004	34.344
2005	33.608
2006	32.779
2007	31.827
2008	30.932
2009	30.08
2010	29.241
2011	28.338
2012	27.703
2013	27.019
2014	26.431
2015	25.785
2016	31.71
2017	24.72
2018	24.519
2019	29.174
2020	28.691
2021	28.606
2022	28.454
2023	28.309