Year	% (modeled ILO estimate)
1991	28.36
1992	28.428
1993	28.827
1994	28.748
1995	28.817
1996	27.968
1997	27.151
1998	26.365
1999	25.609
2000	26.238
2001	26.877
2002	27.528
2003	28.191
2004	28.864
2005	29.543
2006	30.23
2007	30.924
2008	31.627
2009	32.337
2010	33.058
2011	33.789
2012	34.529
2013	35.28
2014	36.038
2015	36.804
2016	37.578
2017	37.54
2018	37.301
2019	37.288
2020	34.01
2021	34.43
2022	34.395
2023	34.736