Year	% (modeled ILO estimate)
1991	60.678
1992	60.794
1993	60.874
1994	60.946
1995	61.049
1996	61.041
1997	61.131
1998	61.238
1999	61.324
2000	61.347
2001	61.257
2002	61.318
2003	61.296
2004	61.236
2005	60.756
2006	60.397
2007	60.044
2008	59.583
2009	58.949
2010	58.344
2011	59.454
2012	63.323
2013	58.401
2014	59.078
2015	59.079
2016	59.124
2017	59.441
2018	59.121
2019	57.874
2020	55.952
2021	57.667
2022	58.403
2023	58.599