Year	% (modeled ILO estimate)
1991	32.294
1992	28.915
1993	27.252
1994	29.834
1995	30.632
1996	28.718
1997	27.039
1998	27.441
1999	25.581
2000	22.914
2001	21.291
2002	21.427
2003	23.035
2004	24.905
2005	23.753
2006	25.231
2007	26.95
2008	29.071
2009	27.715
2010	27.18
2011	24.989
2012	24.797
2013	23.866
2014	23.955
2015	23.933
2016	23.028
2017	26.392
2018	24.089
2019	24.929
2020	21.595
2021	20.236
2022	23.239
2023	23.093