Year	% (modeled ILO estimate)
1991	27.891
1992	28.018
1993	28.115
1994	28.114
1995	28.017
1996	27.879
1997	27.649
1998	27.317
1999	26.831
2000	26.353
2001	25.832
2002	25.266
2003	24.706
2004	24.15
2005	23.638
2006	22.85
2007	22.197
2008	21.58
2009	21.081
2010	20.712
2011	20.272
2012	19.876
2013	19.573
2014	19.353
2015	19.197
2016	19.529
2017	19.831
2018	20.1
2019	20.323
2020	18.685
2021	19.008
2022	20.371
2023	20.777