Year	% (modeled ILO estimate)
1991	18.776
1992	18.729
1993	18.634
1994	18.495
1995	18.288
1996	18.077
1997	17.825
1998	17.544
1999	17.233
2000	16.891
2001	16.616
2002	16.315
2003	16
2004	15.696
2005	15.595
2006	15.494
2007	15.391
2008	15.288
2009	15.184
2010	15.08
2011	14.976
2012	14.875
2013	14.774
2014	14.674
2015	14.509
2016	14.376
2017	14.213
2018	14.029
2019	13.834
2020	13.705
2021	13.598
2022	13.553
2023	13.404