Year	% (modeled ILO estimate)
1991	74.803
1992	74.349
1993	73.879
1994	73.524
1995	73.279
1996	73.077
1997	72.812
1998	72.597
1999	72.334
2000	72.516
2001	72.705
2002	72.84
2003	73.072
2004	73.278
2005	73.572
2006	73.819
2007	74.028
2008	74.085
2009	74.187
2010	74.387
2011	74.665
2012	74.863
2013	74.943
2014	75.112
2015	75.29
2016	75.469
2017	74.375
2018	73.318
2019	72.261
2020	71.633
2021	72.302
2022	72.464
2023	72.452