Year	% (modeled ILO estimate)
1991	60.931
1992	60.999
1993	61.086
1994	61.172
1995	61.237
1996	61.309
1997	61.408
1998	61.417
1999	61.413
2000	61.318
2001	61.396
2002	61.489
2003	60.789
2004	60.082
2005	59.34
2006	58.667
2007	58.144
2008	57.505
2009	56.749
2010	55.998
2011	55.364
2012	54.904
2013	54.188
2014	53.438
2015	52.678
2016	52.199
2017	51.69
2018	51.059
2019	50.225
2020	49.202
2021	49.239
2022	49.763
2023	49.9