Year	% (modeled ILO estimate)
1991	37.375
1992	39.673
1993	42.026
1994	44.108
1995	43.777
1996	43.386
1997	42.974
1998	42.543
1999	42.198
2000	41.826
2001	41.483
2002	41.139
2003	40.804
2004	41.474
2005	42.218
2006	43.016
2007	42.848
2008	42.708
2009	42.526
2010	42.374
2011	42.236
2012	42.114
2013	41.945
2014	41.748
2015	41.591
2016	41.481
2017	41.332
2018	41.167
2019	41.31
2020	40.573
2021	41.14
2022	41.26
2023	41.522