Year	% (modeled ILO estimate)
1991	41.559
1992	42.099
1993	40.687
1994	43.466
1995	43.182
1996	42.893
1997	41.164
1998	40.763
1999	41.799
2000	42.773
2001	40.504
2002	40.287
2003	39.218
2004	40.228
2005	38.122
2006	39.452
2007	40.377
2008	38.95
2009	38.511
2010	37.855
2011	37.236
2012	38.246
2013	37.249
2014	36.272
2015	36.964
2016	36.918
2017	37.794
2018	38.206
2019	39.984
2020	38.867
2021	37.877
2022	37.976
2023	38.395