Year	% (modeled ILO estimate)
1991	32.998
1992	32.802
1993	32.453
1994	32.026
1995	31.555
1996	31.419
1997	31.189
1998	30.904
1999	30.592
2000	30.323
2001	30.414
2002	30.523
2003	30.565
2004	30.609
2005	30.635
2006	30.905
2007	31.108
2008	31.262
2009	31.393
2010	31.497
2011	31.692
2012	29.342
2013	27.115
2014	27.019
2015	26.92
2016	26.816
2017	26.709
2018	26.599
2019	26.484
2020	26.182
2021	26.196
2022	26.027
2023	26.419