Year	% (modeled ILO estimate)
1991	46.961
1992	44.621
1993	43.87
1994	43.113
1995	42.33
1996	41.533
1997	40.733
1998	39.941
1999	39.166
2000	38.414
2001	41.787
2002	38.454
2003	39.742
2004	37.596
2005	38.704
2006	37.906
2007	39.057
2008	39.724
2009	38.406
2010	39.958
2011	36.113
2012	35.086
2013	36.066
2014	39.613
2015	39.159
2016	38.713
2017	40.435
2018	42.229
2019	40.203
2020	36.673
2021	39.96
2022	41.348
2023	41.979