Year	% (modeled ILO estimate)
1991	58.088
1992	58.113
1993	58.207
1994	58.35
1995	58.073
1996	57.774
1997	57.366
1998	57.594
1999	57.74
2000	57.85
2001	57.948
2002	58.006
2003	58.029
2004	58.091
2005	57.896
2006	57.802
2007	57.6
2008	57.257
2009	57.149
2010	57.129
2011	57.183
2012	57.406
2013	57.452
2014	57.552
2015	57.226
2016	56.99
2017	56.832
2018	56.705
2019	56.485
2020	54.764
2021	54.221
2022	54.263
2023	54.645