Year	% (modeled ILO estimate)
1991	45.13
1992	42.892
1993	41.426
1994	40.866
1995	41.396
1996	39.841
1997	41.384
1998	40.6
1999	38.406
2000	39.127
2001	37.434
2002	31.442
2003	32.782
2004	32.47
2005	32.903
2006	34.198
2007	31.323
2008	32.249
2009	28.039
2010	32.838
2011	31.253
2012	32.008
2013	29.873
2014	31.184
2015	35.305
2016	32.88
2017	31.103
2018	32.788
2019	34.213
2020	30.631
2021	32.395
2022	31.321
2023	30.825