Year	% (modeled ILO estimate)
1991	60.538
1992	58.34
1993	56.114
1994	53.952
1995	51.918
1996	49.954
1997	50.349
1998	50.737
1999	51.098
2000	51.422
2001	51.707
2002	51.933
2003	52.084
2004	52.178
2005	52.243
2006	50.143
2007	48.116
2008	45.378
2009	45.996
2010	45.416
2011	42.799
2012	43.479
2013	41.598
2014	40.016
2015	39.851
2016	41.359
2017	42.51
2018	41.802
2019	40.541
2020	36.414
2021	35.402
2022	35.617
2023	36.124