Year	% (modeled ILO estimate)
1991	42.787
1992	43.861
1993	44.824
1994	45.964
1995	46.202
1996	45.851
1997	45.326
1998	45.154
1999	44.891
2000	44.525
2001	44.164
2002	44.123
2003	43.707
2004	43.269
2005	43.236
2006	42.979
2007	42.364
2008	41.733
2009	41.453
2010	41.379
2011	40.88
2012	36.203
2013	36.781
2014	34.599
2015	34.161
2016	31.744
2017	27.61
2018	29.007
2019	27.04
2020	30.438
2021	29.9
2022	29.466
2023	29.028