Year	% (modeled ILO estimate)
1991	65.184
1992	65.143
1993	64.402
1994	63.664
1995	62.961
1996	62.211
1997	61.49
1998	60.72
1999	59.962
2000	59.19
2001	58.418
2002	57.629
2003	55.899
2004	54.167
2005	52.412
2006	50.676
2007	48.95
2008	47.245
2009	45.505
2010	43.752
2011	40.702
2012	39.379
2013	38.11
2014	36.808
2015	35.402
2016	34.01
2017	32.695
2018	31.483
2019	31.269
2020	30.786
2021	30.712
2022	30.492
2023	30.665