Year	% (modeled ILO estimate)
1991	34.11
1992	35.485
1993	36.017
1994	35.86
1995	35.168
1996	34.974
1997	34.541
1998	34.163
1999	33.851
2000	33.785
2001	33.504
2002	33.021
2003	32.154
2004	31.222
2005	30.301
2006	29.363
2007	28.895
2008	26.931
2009	25.897
2010	23.562
2011	24.591
2012	24.689
2013	23.439
2014	22.352
2015	21.356
2016	17.513
2017	17.368
2018	18.286
2019	23.7
2020	22.021
2021	17.112
2022	22.3
2023	23.607