Year	% (modeled ILO estimate)
1991	56.306
1992	56.347
1993	55.873
1994	58.071
1995	57.167
1996	55.742
1997	55.325
1998	57.875
1999	57.324
2000	57.027
2001	56.522
2002	56.469
2003	57.412
2004	56.102
2005	56.228
2006	56.969
2007	57.513
2008	57.369
2009	55.993
2010	56.942
2011	56.985
2012	57.855
2013	58.257
2014	56.903
2015	56.312
2016	56.599
2017	56.346
2018	56.282
2019	57.279
2020	53.769
2021	56.514
2022	58.19
2023	58.489