Year	% (modeled ILO estimate)
1991	42.169
1992	40.999
1993	36.891
1994	35.107
1995	28.122
1996	29.787
1997	31.933
1998	34.007
1999	32.76
2000	31.918
2001	29.762
2002	27.851
2003	31.807
2004	33.302
2005	33.388
2006	34.676
2007	35.108
2008	34.492
2009	33.395
2010	33.093
2011	33.257
2012	33.077
2013	32.242
2014	31.199
2015	30.86
2016	30.372
2017	30.059
2018	30.015
2019	28.93
2020	23.029
2021	28.359
2022	30.33
2023	30.627