Year	% (modeled ILO estimate)
1991	37.233
1992	36.897
1993	36.793
1994	36.675
1995	36.493
1996	36.339
1997	36.042
1998	35.572
1999	35.104
2000	34.637
2001	34.173
2002	33.711
2003	33.252
2004	32.794
2005	32.34
2006	31.888
2007	31.44
2008	31.133
2009	30.828
2010	30.526
2011	30.225
2012	29.927
2013	30.47
2014	31.02
2015	30.055
2016	29.108
2017	27.379
2018	27.666
2019	27.676
2020	25.988
2021	26.624
2022	26.321
2023	26.662