Year	% (modeled ILO estimate)
1991	41.964
1992	41.761
1993	39.789
1994	38.23
1995	37.138
1996	37.207
1997	36.222
1998	36.073
1999	39.284
2000	38.375
2001	39.013
2002	40.788
2003	40.486
2004	39.938
2005	37.392
2006	37.641
2007	37.598
2008	38.162
2009	38.647
2010	38.129
2011	36.901
2012	36.28
2013	38.619
2014	37.504
2015	37.751
2016	37.545
2017	38.108
2018	38.976
2019	37.572
2020	36.253
2021	39.582
2022	42.543
2023	44.587