Year	% (modeled ILO estimate)
1991	54.258
1992	53.471
1993	52.677
1994	51.864
1995	51.057
1996	50.819
1997	50.655
1998	50.546
1999	50.496
2000	50.5
2001	50.491
2002	50.534
2003	50.611
2004	50.651
2005	50.643
2006	50.141
2007	49.634
2008	49.122
2009	48.621
2010	40.373
2011	37.958
2012	32.306
2013	29.397
2014	26.899
2015	29.561
2016	28.403
2017	27.26
2018	26.136
2019	26.645
2020	27.221
2021	27.397
2022	26.562
2023	26.052