Year	% (modeled ILO estimate)
1991	63.952
1992	63.674
1993	63.496
1994	63.278
1995	63.068
1996	62.931
1997	62.758
1998	62.696
1999	62.522
2000	62.399
2001	62.31
2002	62.177
2003	62.057
2004	61.931
2005	61.783
2006	61.578
2007	61.411
2008	61.236
2009	61.067
2010	60.871
2011	60.409
2012	59.955
2013	59.501
2014	59.066
2015	58.644
2016	58.23
2017	57.825
2018	57.654
2019	57.498
2020	56.659
2021	56.291
2022	57.213
2023	57.362