Year	% (modeled ILO estimate)
1991	59.514
1992	55.621
1993	53.913
1994	51.768
1995	49.922
1996	47.529
1997	45.235
1998	43.294
1999	39.813
2000	39.604
2001	40.63
2002	38.006
2003	38.941
2004	41.599
2005	40.93
2006	41.131
2007	39.763
2008	40.043
2009	36.752
2010	34.953
2011	32.36
2012	30.738
2013	24.533
2014	26.021
2015	24.346
2016	26.606
2017	24.415
2018	27.479
2019	30.603
2020	30.584
2021	36.114
2022	35.14
2023	36.522