Year	% (modeled ILO estimate)
1991	21.512
1992	22.495
1993	23.51
1994	24.556
1995	25.633
1996	26.74
1997	26.264
1998	25.793
1999	25.328
2000	24.869
2001	24.415
2002	23.967
2003	23.524
2004	23.087
2005	22.656
2006	22.231
2007	21.811
2008	21.397
2009	20.989
2010	20.587
2011	20.19
2012	19.983
2013	19.756
2014	19.512
2015	19.258
2016	19.028
2017	18.788
2018	18.541
2019	18.291
2020	18.117
2021	18.056
2022	18.448
2023	18.182