Year	% (modeled ILO estimate)
1991	54.983
1992	53.462
1993	52.128
1994	51.579
1995	49.362
1996	49.612
1997	48.552
1998	48.835
1999	46.831
2000	44.851
2001	45.498
2002	45.452
2003	44.528
2004	44.762
2005	44.792
2006	44.134
2007	44.522
2008	42.604
2009	40.332
2010	36.77
2011	37.073
2012	37.603
2013	39.979
2014	39.272
2015	41.411
2016	41.943
2017	41.552
2018	41.005
2019	40.549
2020	36.678
2021	35.466
2022	32.544
2023	32.63