Year	% (modeled ILO estimate)
1991	57.821
1992	57.401
1993	57.126
1994	56.78
1995	56.438
1996	56.242
1997	55.973
1998	55.884
1999	55.603
2000	55.416
2001	55.285
2002	55.09
2003	54.914
2004	54.725
2005	54.475
2006	54.061
2007	53.698
2008	53.291
2009	52.878
2010	52.375
2011	51.443
2012	50.515
2013	49.582
2014	48.693
2015	47.849
2016	47.038
2017	46.241
2018	45.804
2019	45.422
2020	44.54
2021	44.06
2022	45.151
2023	45.388