Year	% (modeled ILO estimate)
1991	40.44
1992	41.204
1993	42.157
1994	42.151
1995	42.047
1996	41.66
1997	41.534
1998	41.545
1999	41.239
2000	40.946
2001	40.792
2002	40.73
2003	40.542
2004	40.25
2005	39.684
2006	39.07
2007	38.685
2008	38.457
2009	41.403
2010	41.685
2011	41.507
2012	41.348
2013	41.208
2014	41.17
2015	40.93
2016	40.916
2017	40.822
2018	40.701
2019	40.728
2020	37.153
2021	38.344
2022	41.167
2023	41.497