Year	% (modeled ILO estimate)
1991	32.996
1992	30.244
1993	28.707
1994	26.577
1995	25.748
1996	25.206
1997	25.038
1998	25.398
1999	25.512
2000	26.063
2001	26.165
2002	25.671
2003	25.265
2004	27.732
2005	25.685
2006	25.291
2007	24.533
2008	24.23
2009	21.528
2010	20.24
2011	19.192
2012	18.465
2013	16.262
2014	15.549
2015	15.616
2016	16.554
2017	17.084
2018	17.68
2019	18.472
2020	16.825
2021	17.514
2022	19.831
2023	20.35