Year	% (modeled ILO estimate)
1991	39.957
1992	39.983
1993	40.068
1994	40.028
1995	39.316
1996	39.378
1997	39.762
1998	39.882
1999	39.451
2000	39.358
2001	38.939
2002	37.984
2003	38.924
2004	39.861
2005	36.96
2006	38.453
2007	36.785
2008	35.135
2009	34.245
2010	32.602
2011	32.119
2012	31.619
2013	31.124
2014	30.652
2015	30.806
2016	30.964
2017	31.126
2018	32.606
2019	32.177
2020	27.835
2021	31.625
2022	30.729
2023	32.075