Year	% (modeled ILO estimate)
1991	29.781
1992	29.55
1993	29.122
1994	28.835
1995	28.487
1996	27.733
1997	27.044
1998	26.286
1999	25.582
2000	24.878
2001	24.712
2002	24.534
2003	24.369
2004	24.189
2005	24.037
2006	24.081
2007	24.089
2008	24.113
2009	24.108
2010	24.054
2011	24.008
2012	23.886
2013	23.687
2014	23.416
2015	23.078
2016	22.724
2017	22.312
2018	21.853
2019	21.352
2020	21.148
2021	21.181
2022	21.291
2023	21.417