Year	% (modeled ILO estimate)
1991	34.089
1992	34.244
1993	34.492
1994	34.63
1995	34.816
1996	35.046
1997	34.6
1998	34.154
1999	33.702
2000	33.246
2001	32.783
2002	32.318
2003	31.901
2004	31.483
2005	31.068
2006	30.66
2007	30.264
2008	31.233
2009	32.216
2010	33.212
2011	34.222
2012	35.249
2013	35.263
2014	35.24
2015	35.042
2016	34.773
2017	34.499
2018	34.225
2019	33.973
2020	33.452
2021	33.335
2022	33.181
2023	33.026