Year	% (modeled ILO estimate)
1991	50.919
1992	51.359
1993	51.434
1994	51.399
1995	49.614
1996	48.174
1997	46.677
1998	47.727
1999	48.82
2000	49.886
2001	49.702
2002	49.65
2003	49.572
2004	49.902
2005	49.848
2006	49.989
2007	49.754
2008	49.79
2009	49.546
2010	49.599
2011	51.401
2012	53.251
2013	53.828
2014	53.983
2015	52.879
2016	51.518
2017	50.416
2018	49.45
2019	49.395
2020	47.58
2021	47.689
2022	49.993
2023	50.399