Year	% (modeled ILO estimate)
1991	49.083
1992	47.614
1993	44.435
1994	42.102
1995	35.554
1996	36.331
1997	39.107
1998	40.168
1999	38.86
2000	38.181
2001	34.801
2002	32.789
2003	39.171
2004	40.243
2005	40.852
2006	41.839
2007	42.098
2008	41.329
2009	40.625
2010	40.907
2011	41.135
2012	41.44
2013	40.245
2014	38.243
2015	37.892
2016	37.371
2017	37.051
2018	36.218
2019	34.59
2020	27.733
2021	33.297
2022	36.093
2023	35.373