Year	% (modeled ILO estimate)
1991	45.893
1992	46.614
1993	46.241
1994	45.546
1995	44.993
1996	44.575
1997	49.662
1998	46.187
1999	41.992
2000	40.647
2001	40.693
2002	40.479
2003	39.908
2004	45.105
2005	44.462
2006	44.369
2007	47.871
2008	47.858
2009	45.447
2010	44.453
2011	42.028
2012	38.254
2013	37.228
2014	36.796
2015	38.968
2016	36.745
2017	42.685
2018	42.301
2019	39.075
2020	33.929
2021	36.119
2022	38.227
2023	40.227