Year	% (modeled ILO estimate)
1991	42.216
1992	42.876
1993	42.933
1994	41.69
1995	39.912
1996	38.959
1997	38.461
1998	37.946
1999	37.641
2000	38.119
2001	38.324
2002	38.658
2003	38.936
2004	39.375
2005	39.715
2006	39.803
2007	39.936
2008	39.643
2009	39.663
2010	39.039
2011	38.122
2012	37.347
2013	36.579
2014	35.823
2015	35.374
2016	34.981
2017	34.509
2018	34.018
2019	33.563
2020	31.297
2021	31.294
2022	33.634
2023	33.732