Year	% (modeled ILO estimate)
1991	61.09
1992	56.58
1993	54.63
1994	51.24
1995	51.11
1996	49.27
1997	52.22
1998	52.12
1999	51.947
2000	51.774
2001	51.602
2002	51.429
2003	51.256
2004	51.083
2005	50.91
2006	52.59
2007	53.26
2008	53.44
2009	49.71
2010	49.42
2011	50.52
2012	51.16
2013	50.76
2014	51.52
2015	51.1
2016	51.23
2017	52.32
2018	51.47
2019	54.29
2020	53.07
2021	53.13
2022	53.312
2023	53.53