Year	% (modeled ILO estimate)
1991	79.652
1992	79.572
1993	79.472
1994	79.352
1995	79.109
1996	79.025
1997	78.841
1998	78.62
1999	78.395
2000	78.221
2001	78.155
2002	78.41
2003	78.656
2004	78.892
2005	79.127
2006	79.36
2007	78.777
2008	78.177
2009	77.543
2010	76.909
2011	76.293
2012	75.67
2013	75.036
2014	74.383
2015	73.798
2016	73.115
2017	72.394
2018	71.609
2019	70.757
2020	69.598
2021	69.359
2022	69.143
2023	69.509