Year	% (modeled ILO estimate)
1991	42.37
1992	42.487
1993	42.652
1994	42.545
1995	42.474
1996	42.259
1997	42.077
1998	41.802
1999	41.464
2000	41.093
2001	40.645
2002	40.276
2003	40.233
2004	40.653
2005	40.989
2006	40.985
2007	40.739
2008	40.279
2009	39.666
2010	39.228
2011	37.264
2012	38.236
2013	39.047
2014	39.908
2015	40.943
2016	40.978
2017	40.925
2018	40.958
2019	40.858
2020	39.39
2021	38.514
2022	38.452
2023	38.808