Year	% (modeled ILO estimate)
1991	34.02
1992	33.18
1993	33.01
1994	32.59
1995	32.51
1996	34.13
1997	32.58
1998	36.56
1999	37.46
2000	35.92
2001	33.63
2002	33.12
2003	30.91
2004	33.2
2005	30.28
2006	28.32
2007	27.27
2008	25.81
2009	27.24
2010	26.97
2011	26.58
2012	27.18
2013	25.43
2014	25.98
2015	24.04
2016	22.74
2017	23.86
2018	21.18
2019	21
2020	19.09
2021	18.78
2022	21.4
2023	22.915