Year	% (modeled ILO estimate)
1991	24.498
1992	24.341
1993	24.256
1994	24.029
1995	23.822
1996	23.759
1997	23.662
1998	23.429
1999	23.24
2000	23.006
2001	22.8
2002	22.535
2003	21.819
2004	21.103
2005	20.521
2006	19.829
2007	19.581
2008	19.385
2009	19.234
2010	19.101
2011	18.902
2012	19.368
2013	19.766
2014	20.242
2015	20.635
2016	24.543
2017	19.547
2018	15.393
2019	18.088
2020	17.64
2021	17.696
2022	17.608
2023	17.579