Year	% (modeled ILO estimate)
1991	54.358
1992	53.007
1993	51.661
1994	50.313
1995	49.609
1996	48.904
1997	48.192
1998	47.484
1999	46.786
2000	46.095
2001	45.404
2002	44.712
2003	44.02
2004	43.333
2005	42.655
2006	41.981
2007	41.322
2008	40.682
2009	40.055
2010	39.432
2011	38.809
2012	38.18
2013	37.545
2014	36.918
2015	36.306
2016	35.703
2017	35.097
2018	34.496
2019	34.559
2020	34.245
2021	33.923
2022	34.104
2023	34.468