Year	% (modeled ILO estimate)
1991	62.308
1992	61.059
1993	61.226
1994	61.303
1995	59.975
1996	60.032
1997	60.399
1998	59.151
1999	57.499
2000	57.685
2001	58.303
2002	57.329
2003	56.528
2004	57.14
2005	57.587
2006	58.338
2007	58.765
2008	58.713
2009	57.573
2010	57.01
2011	58.016
2012	58.51
2013	59.139
2014	59.045
2015	59.116
2016	58.98
2017	59.213
2018	59.558
2019	58.898
2020	56.241
2021	56.31
2022	55.695
2023	55.278