Year	% (modeled ILO estimate)
1991	50.993
1992	50.568
1993	55.904
1994	58.878
1995	59.321
1996	57.92
1997	56.035
1998	52.726
1999	51.577
2000	51.242
2001	49.211
2002	44.594
2003	43.014
2004	45.203
2005	47.902
2006	48.207
2007	49.358
2008	50.167
2009	45.846
2010	46.304
2011	46.2
2012	48.515
2013	49.675
2014	49.603
2015	49.314
2016	48.805
2017	49.191
2018	47.326
2019	46.19
2020	41.76
2021	42.452
2022	44.084
2023	45.06