Year	% (modeled ILO estimate)
1991	35.008
1992	35.67
1993	37.56
1994	36.627
1995	37.947
1996	34.977
1997	34.802
1998	32.092
1999	27.193
2000	25.975
2001	30.598
2002	30.883
2003	32.212
2004	30.191
2005	29.903
2006	29.012
2007	28.071
2008	27.45
2009	29.589
2010	30.326
2011	31.28
2012	32.59
2013	32.512
2014	32.645
2015	32.588
2016	32.179
2017	31.476
2018	29.992
2019	29.005
2020	25.322
2021	27.475
2022	27.357
2023	28.409