Year	% (modeled ILO estimate)
1991	27.01
1992	27.545
1993	27.572
1994	25.066
1995	21.871
1996	19.987
1997	19.366
1998	18.123
1999	17.455
2000	18.536
2001	19.14
2002	19.944
2003	20.943
2004	21.465
2005	22.187
2006	22.924
2007	23.467
2008	23.743
2009	24.034
2010	23.744
2011	23.159
2012	22.479
2013	22.105
2014	21.533
2015	21.333
2016	21.133
2017	21.01
2018	20.735
2019	20.401
2020	18.887
2021	18.832
2022	20.251
2023	20.58