Year	% (modeled ILO estimate)
1991	39.914
1992	39.483
1993	38.035
1994	36.394
1995	35.493
1996	34.961
1997	33.911
1998	33.952
1999	35.807
2000	35.478
2001	35.746
2002	36.882
2003	37.135
2004	36.696
2005	34.051
2006	34.112
2007	34.623
2008	34.719
2009	35.59
2010	35.01
2011	33.981
2012	33.36
2013	35.309
2014	34.366
2015	34.868
2016	34.908
2017	34.964
2018	35.654
2019	34.876
2020	33.847
2021	37.759
2022	40.333
2023	42.755