Year	% (modeled ILO estimate)
1991	22.016
1992	22.091
1993	22.231
1994	22.41
1995	22.632
1996	22.687
1997	22.792
1998	22.927
1999	23.056
2000	23.154
2001	23.119
2002	23.065
2003	23.005
2004	22.927
2005	22.836
2006	22.571
2007	22.608
2008	22.66
2009	22.721
2010	22.782
2011	22.856
2012	22.947
2013	23.055
2014	23.176
2015	23.31
2016	23.455
2017	26.5
2018	26.706
2019	26.801
2020	26.308
2021	26.477
2022	25.513
2023	25.51