Year	% (modeled ILO estimate)
1991	34.083
1992	33.051
1993	31.235
1994	34.274
1995	34.984
1996	35.429
1997	38.475
1998	36.21
1999	32.948
2000	31.205
2001	30.534
2002	30.539
2003	29.086
2004	33.84
2005	34.072
2006	35
2007	37.616
2008	38.395
2009	35.303
2010	34.063
2011	31.523
2012	27.292
2013	26.515
2014	26.813
2015	29.595
2016	28.604
2017	34.724
2018	35.152
2019	33.28
2020	26.997
2021	29.511
2022	32.251
2023	33.169