Year	% (modeled ILO estimate)
1991	33.561
1992	33.691
1993	33.748
1994	34.007
1995	34.13
1996	34.135
1997	33.115
1998	37.323
1999	35.75
2000	34.294
2001	35.436
2002	35.855
2003	36.081
2004	37.843
2005	36.126
2006	36.75
2007	36.437
2008	34.769
2009	32.229
2010	29.496
2011	26.674
2012	28.007
2013	27.256
2014	24.99
2015	28.712
2016	30.247
2017	31.346
2018	30.458
2019	30.464
2020	25.982
2021	30.607
2022	32.503
2023	32.332