Year	% (modeled ILO estimate)
1991	39.288
1992	38.68
1993	36.072
1994	34.335
1995	31.967
1996	27.58
1997	31.407
1998	32.717
1999	33.19
2000	33.809
2001	34.444
2002	35.1
2003	35.756
2004	36.426
2005	37.09
2006	37.753
2007	38.406
2008	39.07
2009	39.726
2010	40.021
2011	40.31
2012	40.608
2013	40.899
2014	41.199
2015	41.503
2016	41.815
2017	44.242
2018	40.655
2019	41.267
2020	38.894
2021	38.152
2022	36.571
2023	36.942