Year	% (modeled ILO estimate)
1991	34.577
1992	35.18
1993	35.243
1994	33.402
1995	30.954
1996	29.555
1997	28.992
1998	28.112
1999	27.626
2000	28.4
2001	28.799
2002	29.361
2003	29.994
2004	30.459
2005	30.964
2006	31.355
2007	31.672
2008	31.643
2009	31.78
2010	31.304
2011	30.535
2012	29.788
2013	29.202
2014	28.531
2015	28.208
2016	27.912
2017	27.616
2018	27.233
2019	26.838
2020	24.954
2021	24.923
2022	26.789
2023	27.003