Year	% (modeled ILO estimate)
1991	75.702
1992	73.114
1993	71.031
1994	71.653
1995	76.782
1996	75.961
1997	77.094
1998	71.253
1999	76.441
2000	74.612
2001	69.313
2002	70.316
2003	68.039
2004	68.971
2005	69.97
2006	70.541
2007	72.071
2008	69.961
2009	68.526
2010	64.035
2011	63.41
2012	61.061
2013	57.298
2014	57.776
2015	58.089
2016	57.983
2017	59.613
2018	59.38
2019	60.518
2020	60.087
2021	60.843
2022	62.715
2023	63.728