Year	% (modeled ILO estimate)
1991	38.669
1992	38.564
1993	38.812
1994	39.19
1995	39.616
1996	39.93
1997	40.026
1998	39.993
1999	40.002
2000	40.187
2001	40.377
2002	40.536
2003	40.583
2004	40.768
2005	40.927
2006	41.109
2007	41.191
2008	41.129
2009	40.204
2010	35.305
2011	38.256
2012	37.781
2013	38.125
2014	37.503
2015	38.326
2016	37.82
2017	38.86
2018	38.301
2019	37.956
2020	36.237
2021	34.612
2022	35.359
2023	36.4