Year	% (modeled ILO estimate)
1991	27.601
1992	27.504
1993	27.435
1994	27.283
1995	27.071
1996	26.735
1997	26.312
1998	25.866
1999	25.487
2000	25.196
2001	24.773
2002	24.495
2003	24.271
2004	24.252
2005	24.217
2006	24.163
2007	24.076
2008	24.059
2009	23.887
2010	23.695
2011	23.739
2012	23.68
2013	23.589
2014	23.491
2015	23.272
2016	23.147
2017	23
2018	22.976
2019	22.783
2020	20.281
2021	20.854
2022	22.629
2023	22.953