Year	% (modeled ILO estimate)
1991	44.311
1992	44.098
1993	43.981
1994	43.897
1995	43.726
1996	43.599
1997	42.949
1998	41.351
1999	40.364
2000	38.556
2001	37.056
2002	36.306
2003	36.074
2004	36.347
2005	36.199
2006	36.619
2007	37.149
2008	39.539
2009	38.429
2010	37.741
2011	38.631
2012	37.375
2013	36.551
2014	36.271
2015	36.021
2016	34.759
2017	34.214
2018	33.676
2019	31.676
2020	26.609
2021	26.828
2022	29.679
2023	29.931