Year	% (modeled ILO estimate)
1991	42.166
1992	41.999
1993	41.772
1994	41.504
1995	41.161
1996	41.095
1997	41.026
1998	40.905
1999	40.826
2000	40.733
2001	40.624
2002	40.514
2003	40.419
2004	40.333
2005	40.253
2006	40.181
2007	40.12
2008	40.069
2009	40.028
2010	39.994
2011	39.947
2012	39.884
2013	39.809
2014	39.727
2015	39.649
2016	39.572
2017	39.498
2018	39.429
2019	39.363
2020	38.942
2021	38.974
2022	38.274
2023	38.32