Year	% (modeled ILO estimate)
1991	30.625
1992	32.145
1993	32.789
1994	33.411
1995	33.647
1996	32.564
1997	31.499
1998	30.453
1999	34.201
2000	31.253
2001	28.425
2002	30.209
2003	31.137
2004	32.073
2005	33.017
2006	33.969
2007	33.739
2008	35.571
2009	35.431
2010	34.769
2011	33.518
2012	33.602
2013	34.509
2014	33.854
2015	32.172
2016	31.485
2017	29.116
2018	24.497
2019	22.81
2020	22.763
2021	24.105
2022	23.866
2023	24.016