Year	% (modeled ILO estimate)
1991	64.453
1992	63.774
1993	63.077
1994	62.304
1995	61.501
1996	60.914
1997	60.303
1998	59.67
1999	59.014
2000	57.519
2001	56.007
2002	54.48
2003	52.941
2004	51.395
2005	49.839
2006	48.272
2007	46.71
2008	45.154
2009	43.602
2010	42.063
2011	40.539
2012	39.036
2013	37.555
2014	37.255
2015	36.896
2016	36.727
2017	36.556
2018	36.351
2019	36.155
2020	35.823
2021	35.48
2022	35.278
2023	35.112