Year	% (modeled ILO estimate)
1991	49.933
1992	48.421
1993	46.91
1994	45.403
1995	43.903
1996	42.558
1997	41.218
1998	39.885
1999	38.56
2000	37.248
2001	37.615
2002	37.984
2003	38.355
2004	38.727
2005	39.1
2006	39.198
2007	38.787
2008	38.812
2009	38.286
2010	39.195
2011	38.498
2012	38.789
2013	38.591
2014	38.333
2015	38.415
2016	38.534
2017	38.552
2018	38.683
2019	39.45
2020	38.705
2021	38.308
2022	38.866
2023	38.68