Year	% (modeled ILO estimate)
1991	41.881
1992	42.013
1993	42.116
1994	42.206
1995	42.199
1996	42.496
1997	42.579
1998	42.55
1999	42.468
2000	42.407
2001	42.559
2002	42.713
2003	42.871
2004	42.974
2005	43.016
2006	41.491
2007	39.986
2008	38.505
2009	37.029
2010	35.604
2011	34.205
2012	32.865
2013	32.926
2014	32.942
2015	32.878
2016	32.826
2017	32.693
2018	32.528
2019	32.332
2020	31.504
2021	31.566
2022	31.501
2023	31.682