Year	% (modeled ILO estimate)
1991	40.061
1992	40.92
1993	41.651
1994	41.496
1995	41.368
1996	41.263
1997	41.327
1998	41.348
1999	41.441
2000	41.465
2001	41.555
2002	41.325
2003	41.421
2004	41.524
2005	41.559
2006	41.39
2007	41.335
2008	41.616
2009	41.86
2010	41.993
2011	41.576
2012	41.57
2013	40.821
2014	40.264
2015	39.505
2016	38.726
2017	38.034
2018	37.252
2019	37.054
2020	35.794
2021	36.036
2022	36.016
2023	36.254