Year	% (modeled ILO estimate)
1991	42.491
1992	43.526
1993	42.954
1994	43.625
1995	43.802
1996	38.708
1997	40.759
1998	42.414
1999	41.585
2000	38.606
2001	39.764
2002	35.66
2003	34.356
2004	37.872
2005	37.837
2006	37.509
2007	35.149
2008	38.247
2009	41.068
2010	36.956
2011	38.369
2012	40.875
2013	41.227
2014	35.721
2015	35.443
2016	38.311
2017	34.756
2018	37.965
2019	37.771
2020	33.599
2021	38.219
2022	37.497
2023	39.905