Year	% (modeled ILO estimate)
1991	38.255
1992	37.855
1993	39.152
1994	39.805
1995	39.678
1996	40.486
1997	41.117
1998	41.15
1999	41.74
2000	41.309
2001	40.818
2002	40.684
2003	41.208
2004	41.858
2005	42.286
2006	42.03
2007	41.088
2008	39.657
2009	36.72
2010	35.154
2011	34.141
2012	34.525
2013	34.503
2014	34.56
2015	35.218
2016	35.368
2017	35.68
2018	36.774
2019	37.505
2020	36.991
2021	37.365
2022	39.099
2023	38.953