Year	% (modeled ILO estimate)
1991	37.745
1992	37.744
1993	37.77
1994	37.752
1995	37.759
1996	37.896
1997	37.925
1998	38.103
1999	38.16
2000	38.284
2001	38.355
2002	38.431
2003	38.578
2004	38.692
2005	38.838
2006	38.821
2007	38.85
2008	38.767
2009	38.685
2010	38.671
2011	38.537
2012	38.671
2013	38.467
2014	38.441
2015	38.256
2016	38.372
2017	38.586
2018	38.651
2019	38.588
2020	36.935
2021	37.24
2022	38.44
2023	39.233