Year	% (modeled ILO estimate)
1991	42.254
1992	41.129
1993	39.527
1994	38.254
1995	36.481
1996	36.719
1997	37.259
1998	37.777
1999	38.337
2000	38.654
2001	38.394
2002	38.168
2003	37.571
2004	37.007
2005	36.485
2006	36.324
2007	36.137
2008	36.025
2009	35.863
2010	35.697
2011	35.501
2012	35.328
2013	35.04
2014	34.766
2015	34.545
2016	34.293
2017	34.068
2018	33.071
2019	32.875
2020	37.275
2021	27.49
2022	28.667
2023	29.45