Year	% (modeled ILO estimate)
1991	38.033
1992	38.29
1993	38.464
1994	38.665
1995	38.979
1996	39.042
1997	39.312
1998	39.66
1999	39.909
2000	40.079
2001	40.106
2002	40.338
2003	40.429
2004	40.653
2005	40.526
2006	40.486
2007	40.462
2008	40.377
2009	40.191
2010	40.036
2011	38.649
2012	43.47
2013	38.27
2014	38.664
2015	37.114
2016	38.193
2017	37.333
2018	37.366
2019	36.063
2020	35.535
2021	37.247
2022	38.655
2023	38.859