Year	% (modeled ILO estimate)
1991	60.82
1992	60.27
1993	59.718
1994	59.163
1995	58.605
1996	58.046
1997	57.484
1998	56.921
1999	56.355
2000	55.788
2001	55.22
2002	54.95
2003	54.68
2004	54.409
2005	54.138
2006	53.867
2007	53.595
2008	53.324
2009	53.052
2010	52.78
2011	51.22
2012	52.145
2013	53.069
2014	53.991
2015	54.91
2016	54.951
2017	55.005
2018	55.369
2019	55.651
2020	54.594
2021	54.135
2022	53.842
2023	54.177