Year	% (modeled ILO estimate)
1991	32.398
1992	32.193
1993	32.268
1994	32.144
1995	32.892
1996	33.66
1997	34.442
1998	35.238
1999	36.048
2000	35.382
2001	34.738
2002	34.117
2003	33.519
2004	32.946
2005	32.394
2006	31.863
2007	31.354
2008	30.867
2009	30.403
2010	29.96
2011	28.631
2012	27.419
2013	26.311
2014	25.294
2015	21.839
2016	22.046
2017	22.206
2018	22.299
2019	22.382
2020	22.145
2021	22.201
2022	22.275
2023	22.275