Year	% (modeled ILO estimate)
1991	39.866
1992	39.395
1993	39.078
1994	39.222
1995	39.576
1996	38.567
1997	37.128
1998	31.499
1999	31.637
2000	32.23
2001	33.985
2002	34.931
2003	34.436
2004	34.682
2005	33.773
2006	31.138
2007	28.571
2008	26.802
2009	25.107
2010	25.854
2011	25.9
2012	26.651
2013	26.364
2014	27.721
2015	28.739
2016	28.856
2017	28.616
2018	28.602
2019	27.818
2020	26.559
2021	29.24
2022	30.814
2023	29.96