Year	% (modeled ILO estimate)
1991	41.849
1992	41.318
1993	40.768
1994	40.128
1995	39.364
1996	38.709
1997	37.93
1998	37.164
1999	36.636
2000	36.031
2001	36.231
2002	36.413
2003	36.579
2004	36.734
2005	36.876
2006	37.001
2007	36.469
2008	35.925
2009	35.37
2010	34.421
2011	34.084
2012	33.746
2013	33.41
2014	33.076
2015	32.748
2016	32.427
2017	32.113
2018	31.805
2019	31.5
2020	32.178
2021	35.926
2022	35.842
2023	35.26