Year	% (modeled ILO estimate)
1991	18.832
1992	19.602
1993	20.399
1994	21.229
1995	22.058
1996	23.505
1997	25.01
1998	26.585
1999	28.224
2000	29.917
2001	30.709
2002	31.5
2003	32.292
2004	33.087
2005	33.888
2006	34.598
2007	35.25
2008	35.996
2009	36.881
2010	37.632
2011	38.472
2012	39.39
2013	40.378
2014	41.386
2015	42.383
2016	43.371
2017	44.027
2018	43.68
2019	42.668
2020	38.926
2021	39.817
2022	38.897
2023	39.746