Year	% (modeled ILO estimate)
1991	29.054
1992	28.99
1993	28.921
1994	28.858
1995	28.564
1996	28.268
1997	27.969
1998	27.68
1999	27.399
2000	27.121
2001	26.836
2002	26.539
2003	26.238
2004	25.94
2005	25.641
2006	25.334
2007	25.041
2008	24.769
2009	24.492
2010	24.204
2011	23.907
2012	23.614
2013	23.339
2014	23.055
2015	22.766
2016	22.486
2017	22.229
2018	21.979
2019	22.036
2020	21.81
2021	21.573
2022	21.836
2023	21.893