Year	% (modeled ILO estimate)
1991	21.043
1992	20.995
1993	20.999
1994	21.067
1995	21.146
1996	21.194
1997	21.217
1998	21.221
1999	21.211
2000	21.189
2001	20.916
2002	20.631
2003	20.336
2004	20.021
2005	19.681
2006	18.966
2007	18.241
2008	17.51
2009	16.784
2010	16.066
2011	15.143
2012	14.262
2013	13.727
2014	13.16
2015	12.544
2016	11.868
2017	11.158
2018	10.442
2019	10.217
2020	9.526
2021	9.843
2022	10.756
2023	13.018