Year	% (modeled ILO estimate)
1991	38.66
1992	38.462
1993	38.68
1994	38.849
1995	38.998
1996	38.943
1997	38.893
1998	38.69
1999	38.448
2000	38.149
2001	37.861
2002	37.596
2003	37.334
2004	37.204
2005	37.063
2006	36.98
2007	36.786
2008	36.68
2009	36.545
2010	36.486
2011	36.192
2012	36.084
2013	36.802
2014	37.447
2015	37.919
2016	38.38
2017	37.062
2018	37.266
2019	37.471
2020	36.824
2021	36.882
2022	36.368
2023	36.453