Year	% (modeled ILO estimate)
1991	60.16
1992	60.108
1993	60.309
1994	60.202
1995	60.153
1996	60.157
1997	60.449
1998	60.404
1999	60.343
2000	60.127
2001	60.149
2002	60.211
2003	60.24
2004	60.253
2005	60.278
2006	60.301
2007	60.33
2008	60.32
2009	60.186
2010	60.214
2011	60.103
2012	59.86
2013	60.09
2014	60.274
2015	60.459
2016	59.986
2017	59.841
2018	60.071
2019	60.418
2020	58.746
2021	59.299
2022	60.65
2023	61.135