Year	% (modeled ILO estimate)
1991	17.042
1992	17.73
1993	18.697
1994	17.114
1995	16.647
1996	15.104
1997	13.83
1998	12.482
1999	13.612
2000	13.261
2001	11.595
2002	12.293
2003	12.963
2004	11.041
2005	9.286
2006	7.699
2007	6.071
2008	5.444
2009	5.407
2010	4.989
2011	5.405
2012	4.382
2013	3.948
2014	3.739
2015	3.705
2016	3.74
2017	3.778
2018	3.82
2019	3.864
2020	3.149
2021	3.435
2022	3.621
2023	3.73