Year	% (modeled ILO estimate)
1991	50.81
1992	50.783
1993	50.27
1994	49.543
1995	49.399
1996	48.882
1997	48.994
1998	48.571
1999	47.602
2000	47.495
2001	47.324
2002	46.048
2003	44.912
2004	45.934
2005	46.271
2006	45.609
2007	44.459
2008	43.848
2009	42.818
2010	41.607
2011	40.657
2012	39.845
2013	38.577
2014	37.325
2015	36.089
2016	34.872
2017	33.36
2018	31.55
2019	28.377
2020	25.397
2021	26.343
2022	26.125
2023	27.216