Year	% (modeled ILO estimate)
1991	55.877
1992	54.194
1993	53.178
1994	52.056
1995	51.01
1996	49.952
1997	48.949
1998	47.941
1999	45.817
2000	45.001
2001	44.962
2002	44.948
2003	44.976
2004	44.982
2005	44.955
2006	44.904
2007	44.012
2008	43.264
2009	42.362
2010	41.638
2011	42.074
2012	42.426
2013	42.649
2014	39.981
2015	37.224
2016	38.576
2017	40.149
2018	39.891
2019	39.606
2020	38.68
2021	38.556
2022	38.399
2023	38.313