Year	% (modeled ILO estimate)
1991	45.014
1992	44.553
1993	43.851
1994	45.326
1995	44.025
1996	41.737
1997	40.221
1998	44.862
1999	43.237
2000	42.445
2001	41.274
2002	40.793
2003	42.958
2004	41.382
2005	41.409
2006	42.371
2007	41.784
2008	41.007
2009	38.611
2010	39.184
2011	39.781
2012	40.317
2013	39.759
2014	38.604
2015	38.349
2016	38.637
2017	38.92
2018	38.761
2019	39.73
2020	36.459
2021	39.035
2022	40.417
2023	40.588