Year	% (modeled ILO estimate)
1991	63.191
1992	62.525
1993	60.149
1994	56.87
1995	55.614
1996	54.546
1997	52.051
1998	50.386
1999	53.229
2000	54.733
2001	54.52
2002	55.516
2003	55.023
2004	55.816
2005	56.493
2006	56.819
2007	58.242
2008	58.599
2009	57.406
2010	57.989
2011	58.759
2012	59.461
2013	59.354
2014	59.539
2015	59.206
2016	59.416
2017	59.309
2018	59.55
2019	59.113
2020	58.162
2021	59.226
2022	59.768
2023	59.148