Year	% (modeled ILO estimate)
1991	39.99
1992	39.021
1993	38.41
1994	38
1995	38.036
1996	37.642
1997	37.407
1998	36.908
1999	35.926
2000	33.564
2001	31.928
2002	32.35
2003	32.749
2004	31.285
2005	29.808
2006	28.33
2007	26.674
2008	24.306
2009	24.78
2010	22.736
2011	21.803
2012	17.566
2013	16.501
2014	16.076
2015	16.097
2016	16.234
2017	16.328
2018	16.4
2019	16.468
2020	14.373
2021	15.072
2022	15.504
2023	15.826