Year	% (modeled ILO estimate)
1991	50.392
1992	50.141
1993	49.938
1994	49.739
1995	49.501
1996	49.252
1997	50.796
1998	48.326
1999	45.893
2000	43.26
2001	42.746
2002	42.211
2003	40.495
2004	39.74
2005	38.987
2006	42.036
2007	44.033
2008	43.28
2009	43.356
2010	41.342
2011	40.058
2012	40.22
2013	39.66
2014	39.229
2015	40.349
2016	39.33
2017	41.485
2018	40.031
2019	37.874
2020	37.855
2021	34.487
2022	35.847
2023	35.641