Year	% (modeled ILO estimate)
1991	23.462
1992	23.601
1993	23.668
1994	23.073
1995	23.408
1996	22.685
1997	22.752
1998	22.323
1999	22.237
2000	22.108
2001	21.646
2002	21.415
2003	21.433
2004	21.444
2005	21.454
2006	21.446
2007	21.474
2008	21.491
2009	20.378
2010	19.3
2011	18.595
2012	17.516
2013	17.398
2014	18.202
2015	17.527
2016	15.504
2017	14.997
2018	14.531
2019	14.102
2020	12.858
2021	12.83
2022	12.542
2023	12.633