Year	% (modeled ILO estimate)
1991	40.925
1992	40.158
1993	39.433
1994	38.277
1995	37.434
1996	36.533
1997	35.611
1998	34.663
1999	33.814
2000	32.942
2001	32.104
2002	31.271
2003	30.453
2004	31.203
2005	32.027
2006	32.902
2007	32.332
2008	31.777
2009	31.181
2010	30.619
2011	30.073
2012	29.557
2013	29.01
2014	28.44
2015	27.911
2016	27.432
2017	26.925
2018	26.406
2019	26.532
2020	25.862
2021	26.054
2022	26.088
2023	26.331