Year	% (modeled ILO estimate)
1991	23.375
1992	23.164
1993	22.976
1994	22.816
1995	22.593
1996	22.821
1997	22.92
1998	23.077
1999	23.241
2000	23.108
2001	22.973
2002	23.035
2003	23.15
2004	22.326
2005	21.524
2006	20.742
2007	19.982
2008	19.242
2009	18.524
2010	17.827
2011	17.15
2012	16.494
2013	15.858
2014	15.243
2015	14.647
2016	14.07
2017	14.094
2018	14.03
2019	13.945
2020	13.039
2021	13.262
2022	13.191
2023	13.687