Year	% (modeled ILO estimate)
1991	36.044
1992	35.996
1993	35.901
1994	35.345
1995	35.547
1996	35.09
1997	34.914
1998	34.691
1999	34.376
2000	34.347
2001	34.509
2002	34.34
2003	34.189
2004	34.46
2005	33.966
2006	33.277
2007	33.251
2008	31.846
2009	31.342
2010	29.868
2011	28.704
2012	27.243
2013	26.047
2014	25.856
2015	24.036
2016	22.288
2017	21.882
2018	21.627
2019	21.456
2020	19.076
2021	19.813
2022	20.383
2023	20.323