Year	% (modeled ILO estimate)
1991	33.403
1992	33.433
1993	33.413
1994	33.446
1995	31.389
1996	29.878
1997	29.125
1998	27.535
1999	27.136
2000	27.157
2001	27.499
2002	28.039
2003	28.7
2004	29.005
2005	29.38
2006	29.622
2007	29.86
2008	29.594
2009	28.494
2010	27.753
2011	27.549
2012	27.389
2013	27.274
2014	25.055
2015	25.098
2016	25.03
2017	26.368
2018	25.44
2019	26.502
2020	22.503
2021	22.125