Year	% (modeled ILO estimate)
1991	46.21
1992	45.581
1993	45.486
1994	45.009
1995	44.85
1996	44.38
1997	43.524
1998	42.671
1999	41.823
2000	40.98
2001	40.142
2002	39.309
2003	38.483
2004	37.663
2005	36.85
2006	37.182
2007	37.515
2008	37.848
2009	38.182
2010	38.517
2011	38.852
2012	38.593
2013	38.334
2014	38.072
2015	38.743
2016	39.42
2017	38.841
2018	38.461
2019	38.607
2020	36.257
2021	36.466
2022	39.257
2023	39.772