Year	% (modeled ILO estimate)
1991	20.862
1992	20.93
1993	21.059
1994	21.225
1995	21.432
1996	21.474
1997	21.32
1998	21.184
1999	21.034
2000	20.844
2001	21.081
2002	21.341
2003	21.623
2004	20.755
2005	19.905
2006	19.869
2007	19.797
2008	19.752
2009	19.738
2010	21.034
2011	20.89
2012	20.755
2013	20.629
2014	20.44
2015	20.28
2016	20.145
2017	22.157
2018	22.315
2019	22.372
2020	21.228
2021	21.485
2022	21.104
2023	21.192