Year	% (modeled ILO estimate)
1991	62.097
1992	55.649
1993	51.585
1994	48.517
1995	46.841
1996	45.872
1997	48.372
1998	50.762
1999	50.435
2000	49.561
2001	51.419
2002	52.326
2003	48.212
2004	47.099
2005	45.968
2006	45.483
2007	44.66
2008	43.577
2009	40.099
2010	37.951
2011	40.363
2012	39.184
2013	36.213
2014	34.736
2015	34.204
2016	35.006
2017	35.554
2018	36.57
2019	36.038
2020	32.207
2021	32.192
2022	33.099
2023	37.21