Year	% (modeled ILO estimate)
1991	61.412
1992	61.438
1993	61.394
1994	61.47
1995	61.454
1996	61.692
1997	61.467
1998	61.149
1999	60.746
2000	60.304
2001	60.014
2002	60.273
2003	60.566
2004	60.856
2005	61.047
2006	61.506
2007	61.903
2008	57.612
2009	53.181
2010	48.69
2011	46.929
2012	45.173
2013	43.398
2014	41.614
2015	41.476
2016	41.322
2017	41.112
2018	40.873
2019	40.62
2020	39.838
2021	39.881
2022	39.967
2023	39.969