Year	% (modeled ILO estimate)
1991	38.178
1992	38.563
1993	38.949
1994	39.331
1995	39.067
1996	38.43
1997	37.771
1998	37.476
1999	37.157
2000	37.065
2001	36.36
2002	34.807
2003	38.227
2004	32.194
2005	33.786
2006	30.714
2007	31.174
2008	36.169
2009	38.543
2010	39.456
2011	41.262
2012	41.708
2013	40.751
2014	41.447
2015	42.36
2016	39.848
2017	40.128
2018	40.447
2019	38.086
2020	38.891
2021	38.757
2022	36.65
2023	36.512