Year	% (modeled ILO estimate)
1991	29.894
1992	29.768
1993	26.687
1994	24.896
1995	23.913
1996	21.681
1997	21.317
1998	19.351
1999	20.078
2000	20.636
2001	20.77
2002	21.113
2003	21.568
2004	21.661
2005	22.078
2006	22.48
2007	22.828
2008	22.981
2009	22.71
2010	22.934
2011	23.264
2012	23.2
2013	23.645
2014	23.875
2015	24.373
2016	24.882
2017	24.965
2018	24.803
2019	24.599
2020	23.688
2021	23.163
2022	23.289
2023	23.419