Year	% (modeled ILO estimate)
1991	29.305
1992	29.744
1993	28.191
1994	29.852
1995	29.732
1996	29.02
1997	27.406
1998	22.894
1999	23.823
2000	23.874
2001	24.351
2002	25.528
2003	24.832
2004	25.257
2005	23.239
2006	21.401
2007	20.133
2008	17.593
2009	17.113
2010	16.996
2011	18.08
2012	18.951
2013	19.461
2014	21.237
2015	22.273
2016	22.283
2017	22.272
2018	20.819
2019	22.136
2020	20.806
2021	21.661
2022	23.354
2023	21.707