Year	% (modeled ILO estimate)
1991	43.057
1992	42.329
1993	40.921
1994	40.884
1995	40.817
1996	40.99
1997	40.554
1998	40.656
1999	39.955
2000	39.897
2001	39.324
2002	39.109
2003	38.617
2004	38.215
2005	37.915
2006	37.852
2007	37.509
2008	37.32
2009	36.073
2010	35.533
2011	37.389
2012	37.354
2013	37.989
2014	38.078
2015	36.797
2016	37.09
2017	37.015
2018	37.808
2019	40.486
2020	37.338
2021	37.752
2022	39.819
2023	39.544