Year	% (modeled ILO estimate)
1991	68.933
1992	67.835
1993	67.459
1994	66.52
1995	65.66
1996	66.665
1997	67.779
1998	68.404
1999	65.187
2000	61.91
2001	61.727
2002	61.545
2003	61.36
2004	59.297
2005	57.14
2006	54.964
2007	53.641
2008	51.517
2009	49.335
2010	47.882
2011	45.218
2012	43.713
2013	42.069
2014	41.473
2015	40.99
2016	40.71
2017	40.53
2018	40.422
2019	40.35
2020	37.744
2021	38.626
2022	38.672
2023	39.106