Year	% (modeled ILO estimate)
1991	56.851
1992	56.814
1993	56.704
1994	56.536
1995	56.335
1996	56.48
1997	56.561
1998	56.577
1999	56.674
2000	56.789
2001	57.141
2002	57.418
2003	57.661
2004	57.892
2005	58.06
2006	58.458
2007	58.768
2008	58.967
2009	59.138
2010	59.207
2011	59.42
2012	56.895
2013	54.396
2014	51.944
2015	51.869
2016	51.851
2017	51.771
2018	51.626
2019	51.45
2020	50.958
2021	50.96
2022	49.979
2023	50.116