Year	% (modeled ILO estimate)
1991	58.179
1992	57.857
1993	57.564
1994	57.411
1995	56.848
1996	56.437
1997	56.133
1998	55.298
1999	54.347
2000	53.288
2001	52.09
2002	50.808
2003	49.566
2004	48.818
2005	47.974
2006	47.162
2007	46.034
2008	45.995
2009	45.829
2010	45.709
2011	45.534
2012	45.453
2013	45.401
2014	45.278
2015	42.069
2016	38.982
2017	38.413
2018	37.47
2019	36.039
2020	31.356
2021	31.071
2022	32.579
2023	32.871