Year	% (modeled ILO estimate)
1991	31.564
1992	29.94
1993	24.997
1994	23.927
1995	24.264
1996	23.708
1997	24.946
1998	26.613
1999	29.882
2000	32.272
2001	33.652
2002	34.252
2003	34.475
2004	34.814
2005	38.509
2006	39.566
2007	39.225
2008	36.038
2009	28.044
2010	24.959
2011	22.022
2012	18.396
2013	16.825
2014	16.714
2015	17.929
2016	18.349
2017	20.474
2018	21.659
2019	22.259
2020	18.457
2021	20.569
2022	22.961
2023	23.556