Year	% (modeled ILO estimate)
1991	45.997
1992	44.952
1993	42.577
1994	39.701
1995	38.764
1996	37.632
1997	35.38
1998	36.513
1999	29.675
2000	27.608
2001	28.851
2002	29.323
2003	31.07
2004	32.801
2005	41.739
2006	40.453
2007	31.874
2008	30.502
2009	29.253
2010	33.907
2011	27.621
2012	32.428
2013	33.13
2014	37.32
2015	38.17
2016	40.004
2017	40.078
2018	40.39
2019	40.38
2020	38.657
2021	39.297
2022	39.859
2023	39.622