Year	% (modeled ILO estimate)
1991	48.749
1992	48.601
1993	46.936
1994	47.5
1995	46.629
1996	45.796
1997	44.173
1998	42.949
1999	40.062
2000	38.282
2001	35.982
2002	33.659
2003	31.434
2004	28.536
2005	27.34
2006	27.68
2007	28.491
2008	28.069
2009	26.537
2010	25.209
2011	24.523
2012	25.166
2013	25.566
2014	27.095
2015	28.389
2016	28.622
2017	29.142
2018	28.367
2019	28.032
2020	25.128
2021	24.84
2022	25.738
2023	25.826