Year	% (modeled ILO estimate)
1991	21.705
1992	21.78
1993	21.773
1994	21.552
1995	21.291
1996	21.821
1997	22.359
1998	22.893
1999	23.441
2000	24.007
2001	24.185
2002	24.341
2003	24.465
2004	24.631
2005	24.76
2006	25.125
2007	25.462
2008	25.828
2009	26.067
2010	26.38
2011	26.72
2012	27.101
2013	27.44
2014	27.749
2015	28.084
2016	28.42
2017	28.624
2018	31.422
2019	25.401
2020	24.103
2021	22.587
2022	22.974
2023	23.959