Year	% (modeled ILO estimate)
1991	35.964
1992	35.415
1993	34.93
1994	34.631
1995	34.083
1996	33.536
1997	32.818
1998	32.217
1999	31.651
2000	31.128
2001	30.371
2002	29.697
2003	28.964
2004	28.564
2005	28.078
2006	27.656
2007	27.285
2008	26.853
2009	26.296
2010	27.626
2011	26.716
2012	25.84
2013	24.89
2014	23.869
2015	22.872
2016	21.914
2017	20.904
2018	19.591
2019	17.679
2020	14.555
2021	15.525
2022	15.578
2023	15.816