Year	% (modeled ILO estimate)
1991	39.258
1992	39.161
1993	38.993
1994	38.795
1995	38.596
1996	38.518
1997	38.404
1998	38.267
1999	38.114
2000	37.955
2001	38.187
2002	38.397
2003	38.584
2004	38.745
2005	38.874
2006	39.086
2007	39.209
2008	39.267
2009	39.291
2010	39.289
2011	39.041
2012	38.782
2013	38.484
2014	38.1
2015	37.61
2016	37.089
2017	36.451
2018	35.746
2019	36.656
2020	39.339
2021	38.239
2022	34.957
2023	34.827