Year	% (modeled ILO estimate)
1991	44.566
1992	42.834
1993	41.092
1994	38.013
1995	38.478
1996	40.41
1997	40.085
1998	35.856
1999	31.364
2000	28.535
2001	27.878
2002	28.202
2003	28.874
2004	27.872
2005	27.881
2006	28.999
2007	30.793
2008	30.743
2009	26.618
2010	23.54
2011	24.794
2012	24.054
2013	24.407
2014	28.205
2015	28.411
2016	31.876
2017	32.371
2018	34.022
2019	31.594
2020	28.475
2021	25.496
2022	26.594
2023	26.81