Year	% (modeled ILO estimate)
1991	62.683
1992	60.542
1993	57.65
1994	56.974
1995	58.14
1996	57.142
1997	58.453
1998	59.738
1999	59.862
2000	60.847
2001	58.725
2002	56.562
2003	54.369
2004	52.154
2005	49.927
2006	47.693
2007	45.461
2008	43.242
2009	41.044
2010	38.875
2011	39.019
2012	38.686
2013	38.453
2014	37.012
2015	36.431
2016	35.989
2017	35.796
2018	36.104
2019	35.61
2020	35.279
2021	34.774
2022	34.661
2023	34.468