Year	% (modeled ILO estimate)
1991	40.323
1992	41.257
1993	41.713
1994	41.951
1995	42.025
1996	39.793
1997	38.146
1998	37.384
1999	35.318
2000	33.96
2001	32.665
2002	29.074
2003	27.325
2004	28.007
2005	24.884
2006	23.958
2007	24.309
2008	24.678
2009	24.428
2010	24.381
2011	23.403
2012	23.663
2013	22.939
2014	22.472
2015	24.509
2016	22.26
2017	24.451
2018	24.693
2019	24.664
2020	24.583
2021	21.195
2022	19.74
2023	19.435