Year	% (modeled ILO estimate)
1991	36.258
1992	35.428
1993	33.934
1994	33.755
1995	33.544
1996	34.012
1997	33.159
1998	33.902
1999	33.47
2000	32.971
2001	32.319
2002	31.969
2003	31.728
2004	30.985
2005	30.736
2006	30.689
2007	30.139
2008	29.995
2009	29.074
2010	28.258
2011	29.535
2012	29.184
2013	29.823
2014	30.588
2015	29.552
2016	30.424
2017	30.466
2018	30.649
2019	32.855
2020	30.165
2021	30.408
2022	33.234
2023	32.764