Year	% (modeled ILO estimate)
1991	41.815
1992	41.531
1993	41.501
1994	41.47
1995	41.701
1996	41.704
1997	41.747
1998	41.684
1999	41.317
2000	41.065
2001	40.971
2002	41.144
2003	41.185
2004	41.082
2005	41.096
2006	40.477
2007	40.149
2008	39.529
2009	39.181
2010	38.802
2011	39.01
2012	39.067
2013	38.955
2014	38.825
2015	38.748
2016	38.718
2017	38.671
2018	38.637
2019	38.736
2020	35.948
2021	36.375
2022	38.598
2023	39.026