Year	% (modeled ILO estimate)
1991	36.012
1992	33.82
1993	34.909
1994	35.253
1995	35.579
1996	31.486
1997	33.871
1998	38.151
1999	37.092
2000	35.535
2001	37.411
2002	35.806
2003	35.951
2004	32.901
2005	36.736
2006	37.376
2007	38.999
2008	38.188
2009	36.606
2010	33.992
2011	34.004
2012	38.805
2013	40.305
2014	38.697
2015	37.639
2016	33.072
2017	32.914
2018	35.701
2019	38.687
2020	37.515
2021	41.054
2022	37.304
2023	33.649