Year	% (modeled ILO estimate)
1991	32.025
1992	31.865
1993	31.628
1994	31.332
1995	30.994
1996	30.882
1997	30.707
1998	30.495
1999	30.275
2000	30.064
2001	30.117
2002	30.138
2003	30.147
2004	30.148
2005	30.149
2006	30.332
2007	30.463
2008	30.556
2009	30.624
2010	30.672
2011	30.802
2012	28.435
2013	26.179
2014	25.955
2015	25.732
2016	25.509
2017	25.287
2018	25.065
2019	24.843
2020	24.493
2021	24.483
2022	24.387
2023	24.611