Year	% (modeled ILO estimate)
1991	58.621
1992	58.836
1993	54.779
1994	59.125
1995	51.169
1996	53.622
1997	53.991
1998	56.357
1999	58.582
2000	55.531
2001	54.453
2002	53.405
2003	52.359
2004	51.322
2005	50.297
2006	49.265
2007	48.234
2008	47.207
2009	46.192
2010	45.191
2011	44.556
2012	44.372
2013	42.783
2014	40.591
2015	42.04
2016	42.034
2017	41.606
2018	39.059
2019	39.233
2020	38.112
2021	39.1
2022	40.41
2023	40.411