Year	% (modeled ILO estimate)
1991	15.823
1992	15.949
1993	15.917
1994	16.042
1995	16.764
1996	17.506
1997	18.264
1998	19.042
1999	19.841
2000	18.359
2001	16.96
2002	15.654
2003	14.426
2004	13.287
2005	12.232
2006	11.245
2007	10.325
2008	9.465
2009	8.671
2010	7.942
2011	6.827
2012	5.893
2013	5.082
2014	4.412
2015	3.633
2016	3.58
2017	3.556
2018	3.61
2019	3.631
2020	3.569
2021	3.43
2022	3.512
2023	3.58