Year	% (modeled ILO estimate)
1991	61.095
1992	60.323
1993	59.545
1994	58.766
1995	57.986
1996	57.21
1997	56.438
1998	55.67
1999	54.906
2000	54.147
2001	53.254
2002	52.365
2003	51.479
2004	50.592
2005	49.703
2006	48.812
2007	47.919
2008	47.025
2009	46.127
2010	45.224
2011	44.323
2012	43.425
2013	42.529
2014	41.636
2015	40.749
2016	40.607
2017	40.402
2018	40.192
2019	39.973
2020	39.212
2021	39.115
2022	39.002
2023	38.886