Year	% (modeled ILO estimate)
1991	42.972
1992	41.846
1993	38.171
1994	35.522
1995	32.119
1996	26.483
1997	31.817
1998	33.795
1999	34.537
2000	35.2
2001	35.879
2002	36.581
2003	37.28
2004	37.993
2005	38.695
2006	39.392
2007	40.073
2008	40.763
2009	41.438
2010	41.614
2011	41.779
2012	41.955
2013	42.12
2014	42.297
2015	42.477
2016	42.668
2017	43.827
2018	41.041
2019	40.23
2020	39.34
2021	38.103
2022	37.652
2023	37.867