Year	% (modeled ILO estimate)
1991	19.543
1992	20.211
1993	21.043
1994	21.74
1995	22.519
1996	23.346
1997	23.501
1998	23.442
1999	23.363
2000	23.172
2001	23.135
2002	23.107
2003	23.05
2004	22.985
2005	22.941
2006	22.911
2007	22.891
2008	22.851
2009	21.886
2010	20.826
2011	19.676
2012	19.537
2013	19.564
2014	19.779
2015	20.163
2016	20.234
2017	20.227
2018	20.201
2019	20.126
2020	19.205
2021	19.47
2022	19.971
2023	18.357