Year	% (modeled ILO estimate)
1991	34.087
1992	33.188
1993	32.712
1994	32.758
1995	32.35
1996	32.566
1997	32.316
1998	32.089
1999	31.666
2000	31.882
2001	31.423
2002	30.978
2003	30.328
2004	30.362
2005	30.189
2006	30.459
2007	30.375
2008	29.879
2009	27.642
2010	27.368
2011	26.296
2012	24.904
2013	24.149
2014	24.218
2015	24.726
2016	24.437
2017	24.642
2018	24.596
2019	24.284
2020	21.61
2021	22.668
2022	24.262
2023	24.83