Year	% (modeled ILO estimate)
1991	44.681
1992	44.936
1993	44.972
1994	44.738
1995	44.466
1996	44.056
1997	43.717
1998	44.056
1999	43.954
2000	43.693
2001	43.587
2002	43.4
2003	43.05
2004	43.769
2005	43.379
2006	42.76
2007	41.969
2008	41.469
2009	41.838
2010	41.428
2011	43.137
2012	42.627
2013	41.827
2014	42.557
2015	40.457
2016	39.969
2017	37.099
2018	35.7
2019	34.75
2020	30.132
2021	31.174
2022	33.496
2023	34.079