Year	% (modeled ILO estimate)
1991	32.055
1992	32.008
1993	32.005
1994	31.719
1995	31.482
1996	31.033
1997	30.561
1998	30.239
1999	29.886
2000	29.566
2001	29.506
2002	29.404
2003	29.276
2004	29.229
2005	29.24
2006	29.272
2007	29.332
2008	29.34
2009	29.317
2010	29.261
2011	29.206
2012	29.11
2013	28.977
2014	28.805
2015	28.595
2016	28.376
2017	28.136
2018	27.86
2019	27.553
2020	27.295
2021	27.168
2022	27.541
2023	27.51