Year	% (modeled ILO estimate)
1991	27.69
1992	25.161
1993	24.053
1994	23.036
1995	20.062
1996	22.005
1997	23.129
1998	21.44
1999	19.641
2000	18.093
2001	18.927
2002	18.715
2003	18.922
2004	21.567
2005	21.9
2006	23.389
2007	21.654
2008	22.044
2009	22.137
2010	22.01
2011	21.363
2012	19.539
2013	19.701
2014	19.36
2015	17.557
2016	18.124
2017	17.061
2018	16.899
2019	16.783
2020	14.481
2021	15.071
2022	15.489
2023	15.974