Year	% (modeled ILO estimate)
1991	15.52
1992	15.018
1993	14.503
1994	14.079
1995	13.664
1996	13.298
1997	12.828
1998	12.381
1999	11.894
2000	11.357
2001	10.809
2002	10.484
2003	10.118
2004	9.768
2005	9.376
2006	8.981
2007	9.403
2008	12.196
2009	11.403
2010	9.92
2011	9.196
2012	7.425
2013	7.812
2014	7.952
2015	7.925
2016	8.688
2017	11.303
2018	12.464
2019	18.496
2020	15.245
2021	14.637
2022	13.348
2023	13.017