Year	% (modeled ILO estimate)
1991	57.768
1992	57.784
1993	57.812
1994	57.838
1995	57.626
1996	57.307
1997	57.052
1998	56.445
1999	56.341
2000	56.075
2001	55.908
2002	55.746
2003	55.477
2004	55.277
2005	55.163
2006	55.022
2007	54.856
2008	54.585
2009	54.262
2010	54.087
2011	53.976
2012	53.938
2013	53.702
2014	53.532
2015	53.28
2016	52.974
2017	52.683
2018	52.357
2019	51.952
2020	47.053
2021	48.926
2022	48.285
2023	48.407