Year	% (modeled ILO estimate)
1991	34.359
1992	33.669
1993	33.234
1994	32.843
1995	32.424
1996	31.797
1997	31.59
1998	31.228
1999	31.103
2000	30.958
2001	30.882
2002	30.903
2003	30.965
2004	30.837
2005	30.815
2006	30.793
2007	30.77
2008	31.439
2009	32.116
2010	32.801
2011	33.493
2012	34.192
2013	34.897
2014	35.61
2015	36.327
2016	37.045
2017	37.762
2018	38.478
2019	39.198
2020	34.308
2021	35.155
2022	35.529
2023	35.642