Year	% (modeled ILO estimate)
1991	38.624
1992	38.071
1993	37.777
1994	36.804
1995	35.55
1996	34.33
1997	35.031
1998	33.535
1999	34.626
2000	36.369
2001	37.919
2002	37.037
2003	36.688
2004	36.411
2005	36.088
2006	37.496
2007	38.298
2008	38.584
2009	38.426
2010	38.319
2011	38.268
2012	38.258
2013	38.23
2014	39.17
2015	39.371
2016	38.682
2017	39.544
2018	39.705
2019	39.992
2020	37.794
2021	40.286
2022	40.658
2023	41.124