Year	% (modeled ILO estimate)
1991	38.592
1992	41.502
1993	43.682
1994	44.364
1995	45.861
1996	44.582
1997	43.31
1998	42.051
1999	46.24
2000	42.15
2001	38.269
2002	38.8
2003	40.577
2004	42.391
2005	44.245
2006	46.144
2007	46.916
2008	50.449
2009	49.393
2010	49.468
2011	48.501
2012	48.764
2013	49.08
2014	47.426
2015	42.28
2016	41.343
2017	37.943
2018	36.299
2019	35.657
2020	37.219
2021	38.95
2022	38.657
2023	38.782