Year	% (modeled ILO estimate)
1991	73.955
1992	73.759
1993	73.857
1994	73.425
1995	73.949
1996	73.84
1997	74.06
1998	73.74
1999	73.61
2000	73.548
2001	73.313
2002	73.27
2003	73.37
2004	73.608
2005	73.644
2006	72.295
2007	70.993
2008	69.628
2009	68.184
2010	66.566
2011	64.893
2012	63.957
2013	63.099
2014	62.279
2015	61.45
2016	60.546
2017	59.654
2018	59.808
2019	59.999
2020	58.957
2021	59.112
2022	59.86
2023	60.047