Year	% (modeled ILO estimate)
1991	28.631
1992	27.047
1993	25.598
1994	24.143
1995	23.542
1996	23.012
1997	22.292
1998	21.245
1999	22.64
2000	23.792
2001	19.842
2002	18.539
2003	17.489
2004	19.485
2005	21.31
2006	23.23
2007	22.839
2008	22.336
2009	21.302
2010	19.88
2011	19.923
2012	20.24
2013	20.256
2014	20.247
2015	20.187
2016	20.17
2017	20.219
2018	20.489
2019	20.504
2020	17.957
2021	17.724
2022	17.621
2023	17.737