Year	% (modeled ILO estimate)
1991	23.883
1992	24.057
1993	24.088
1994	23.862
1995	23.558
1996	23.288
1997	23.101
1998	22.745
1999	23.416
2000	23.196
2001	23.151
2002	23.049
2003	22.906
2004	22.612
2005	22.329
2006	21.743
2007	21.27
2008	20.764
2009	21.22
2010	21.031
2011	20.8
2012	24.089
2013	23.211
2014	29.212
2015	30.171
2016	32.746
2017	31.194
2018	32.831
2019	36.513
2020	30.812
2021	30.86
2022	30.257
2023	31.352