Year	% (modeled ILO estimate)
1991	40.917
1992	41.158
1993	40.79
1994	41.425
1995	40.679
1996	39.841
1997	39.92
1998	39.743
1999	39.552
2000	38.671
2001	37.784
2002	37.262
2003	36.714
2004	36.15
2005	35.655
2006	35.479
2007	34.691
2008	34.677
2009	35.547
2010	35.62
2011	35.167
2012	35.946
2013	36.169
2014	36.301
2015	35.801
2016	34.752
2017	34.668
2018	35.039
2019	34.595
2020	34.257
2021	34.142
2022	34.706
2023	34.534