Year	% (modeled ILO estimate)
1991	41.483
1992	41.883
1993	39.052
1994	42.605
1995	36.641
1996	39.007
1997	39.77
1998	44.292
1999	45.72
2000	44.176
2001	42.452
2002	40.244
2003	40.443
2004	39.672
2005	39.398
2006	40.214
2007	39.748
2008	40.253
2009	38.19
2010	37.979
2011	38.889
2012	38.277
2013	36.616
2014	34.416
2015	35.498
2016	35.301
2017	35.729
2018	32.741
2019	32.714
2020	30.101
2021	31.463
2022	32.142
2023	31.335