Year	% (modeled ILO estimate)
1991	34.921
1992	34.102
1993	30.583
1994	28.009
1995	28.452
1996	28.005
1997	26.583
1998	27.456
1999	29.658
2000	31.128
2001	32.799
2002	33.692
2003	33.828
2004	32.088
2005	29.894
2006	29.714
2007	30.512
2008	30.869
2009	28.997
2010	29.489
2011	28.757
2012	27.157
2013	29.401
2014	27.918
2015	27.814
2016	28.11
2017	29.204
2018	30.474
2019	29.714
2020	28.883
2021	31.921
2022	34.618
2023	36.993