Year	% (modeled ILO estimate)
1991	27.647
1992	27.932
1993	28.174
1994	28.314
1995	28.462
1996	28.682
1997	29.005
1998	29.268
1999	29.533
2000	29.699
2001	29.88
2002	29.816
2003	29.924
2004	29.995
2005	30.116
2006	30.024
2007	29.978
2008	30.245
2009	30.463
2010	30.575
2011	30.384
2012	30.424
2013	31.77
2014	33.387
2015	34.841
2016	36.338
2017	37.973
2018	39.566
2019	39.43
2020	38.225
2021	38.231
2022	38.213
2023	38.467