Year	% (modeled ILO estimate)
1991	42.046
1992	42.173
1993	42.38
1994	42.487
1995	42.638
1996	42.831
1997	42.369
1998	41.908
1999	41.448
2000	40.99
2001	40.534
2002	40.08
2003	39.44
2004	38.805
2005	38.173
2006	37.545
2007	36.921
2008	37.584
2009	38.251
2010	38.923
2011	39.599
2012	40.279
2013	40.289
2014	40.278
2015	40.124
2016	39.913
2017	39.694
2018	39.466
2019	39.251
2020	38.809
2021	38.525
2022	38.362
2023	38.199