Year	% (modeled ILO estimate)
1991	31.958
1992	30.961
1993	29.911
1994	28.736
1995	28.16
1996	27.462
1997	26.859
1998	25.894
1999	25.056
2000	23.211
2001	22.51
2002	21.79
2003	21.15
2004	20.397
2005	19.713
2006	18.418
2007	17.507
2008	17.736
2009	18.273
2010	17.937
2011	18.54
2012	18.558
2013	18.847
2014	18.687
2015	18.596
2016	18.308
2017	18.169
2018	17.932
2019	17.393
2020	15.359
2021	15.776
2022	16.259
2023	16.229