Year	% (modeled ILO estimate)
1991	40.012
1992	39.906
1993	37.812
1994	37.313
1995	36.634
1996	34.697
1997	33.742
1998	35.157
1999	34.465
2000	34.751
2001	35.033
2002	35.321
2003	35.604
2004	35.877
2005	36.148
2006	36.417
2007	36.687
2008	35.393
2009	36.035
2010	35.142
2011	34.076
2012	32.861
2013	31.947
2014	30.987
2015	30.016
2016	29.252
2017	27.883
2018	26.689
2019	33.38
2020	27.646
2021	27.033
2022	30.56
2023	30.732