Year	% (modeled ILO estimate)
1991	53.853
1992	56.645
1993	59.113
1994	60.85
1995	61.718
1996	61.682
1997	61.374
1998	60.793
1999	60.358
2000	59.657
2001	56.026
2002	53.164
2003	51.272
2004	47.186
2005	47.713
2006	44.009
2007	39.475
2008	36.018
2009	35.424
2010	33.515
2011	33.137
2012	33.348
2013	34.243
2014	35.928
2015	37.522
2016	40.082
2017	41.922
2018	43.555
2019	46.948
2020	46.26
2021	47.112
2022	46.587
2023	46.738