Year	% (modeled ILO estimate)
1991	38.177
1992	38.74
1993	39.165
1994	39.452
1995	39.627
1996	40.207
1997	40.62
1998	40.876
1999	41.004
2000	40.969
2001	41.499
2002	41.887
2003	40.954
2004	40.023
2005	39.094
2006	38.17
2007	37.248
2008	36.327
2009	35.404
2010	34.481
2011	33.559
2012	32.64
2013	31.724
2014	30.814
2015	29.91
2016	29.014
2017	28.126
2018	27.25
2019	26.388
2020	26.115
2021	26.218
2022	25.961
2023	25.886