Year	% (modeled ILO estimate)
1991	57.411
1992	57.328
1993	57.118
1994	56.883
1995	56.812
1996	56.565
1997	56.009
1998	55.768
1999	55.53
2000	55.099
2001	55.242
2002	55.293
2003	55.503
2004	55.479
2005	55.521
2006	55.607
2007	55.675
2008	55.745
2009	55.765
2010	55.673
2011	55.582
2012	55.421
2013	55.176
2014	54.91
2015	54.595
2016	54.303
2017	53.946
2018	53.565
2019	53.185
2020	52.126
2021	52.145
2022	53.15
2023	53.265