Year	% (modeled ILO estimate)
1991	35.185
1992	32.226
1993	26.285
1994	30.983
1995	29.658
1996	30.282
1997	27.419
1998	27.595
1999	28.43
2000	24.518
2001	24.091
2002	23.776
2003	21.444
2004	19.461
2005	19.102
2006	18.991
2007	19.034
2008	19.486
2009	19.064
2010	20.011
2011	20.984
2012	20.611
2013	21.447
2014	22.004
2015	22.966
2016	23.181
2017	23.108
2018	23.403
2019	22.715
2020	19.378
2021	21.298
2022	23.271
2023	23.884