Year	% (modeled ILO estimate)
1991	41.621
1992	36.88
1993	39.636
1994	40.585
1995	35.034
1996	33.952
1997	33.431
1998	41.777
1999	35.81
2000	31.05
2001	30.366
2002	29.71
2003	29.072
2004	28.444
2005	27.819
2006	27.22
2007	26.627
2008	26.028
2009	25.412
2010	24.765
2011	23.303
2012	22.742
2013	23.193
2014	22.209
2015	24.793
2016	22.951
2017	23.84
2018	20.565
2019	21.587
2020	19.492
2021	20.433
2022	21.191
2023	21.329