Year	% (modeled ILO estimate)
1991	38.2
1992	35.202
1993	33.869
1994	31.27
1995	30.738
1996	29.907
1997	29.955
1998	30.403
1999	30.193
2000	30.138
2001	30.086
2002	30.102
2003	29.651
2004	32.573
2005	30.321
2006	30.278
2007	29.3
2008	28.942
2009	25.89
2010	23.939
2011	22.695
2012	21.744
2013	18.663
2014	18.153
2015	18.588
2016	19.166
2017	20.044
2018	20.791
2019	21.496
2020	20.489
2021	21.187
2022	23.363
2023	24.407