Year	% (modeled ILO estimate)
1991	58.859
1992	57.261
1993	53.932
1994	51.437
1995	48.648
1996	44.505
1997	48.494
1998	50.189
1999	50.959
2000	51.843
2001	52.636
2002	53.368
2003	54.043
2004	54.706
2005	55.416
2006	56.178
2007	56.993
2008	57.874
2009	58.757
2010	59.246
2011	59.713
2012	60.124
2013	60.425
2014	60.674
2015	60.886
2016	61.067
2017	61.303
2018	61.835
2019	62.129
2020	62.052
2021	62.297
2022	62.699
2023	62.528