Year	% (modeled ILO estimate)
1991	19.702
1992	19.513
1993	19.242
1994	18.925
1995	18.752
1996	18.496
1997	18.337
1998	18.228
1999	18.034
2000	17.743
2001	17.555
2002	17.251
2003	16.879
2004	16.496
2005	16.112
2006	15.489
2007	14.884
2008	14.293
2009	13.781
2010	13.304
2011	13.016
2012	12.8
2013	12.614
2014	12.41
2015	12.181
2016	12.037
2017	11.848
2018	11.606
2019	11.39
2020	10.845
2021	10.946
2022	11.395
2023	11.39