Year	% (modeled ILO estimate)
1991	41.957
1992	42.37
1993	42.689
1994	42.922
1995	43.064
1996	43.481
1997	43.804
1998	43.974
1999	44.037
2000	43.946
2001	44.32
2002	44.582
2003	43.246
2004	41.917
2005	40.581
2006	39.299
2007	38.116
2008	36.884
2009	35.606
2010	34.353
2011	33.181
2012	32.118
2013	30.946
2014	29.781
2015	28.638
2016	27.654
2017	26.68
2018	25.674
2019	24.596
2020	24.012
2021	24.254
2022	24.202
2023	24.166