Year	% (modeled ILO estimate)
1991	48.436
1992	50.787
1993	48.98
1994	46.834
1995	44.969
1996	41.371
1997	35.511
1998	31.854
1999	38.369
2000	38.223
2001	37.21
2002	37.625
2003	35.507
2004	36.157
2005	36.369
2006	35.527
2007	36.542
2008	40.036
2009	37.466
2010	37.91
2011	38.759
2012	37.443
2013	38.123
2014	37.187
2015	35.342
2016	35.159
2017	33.003
2018	31.43
2019	31.106
2020	29.725
2021	29.342
2022	27.671
2023	27.09