Year	% (modeled ILO estimate)
1991	43.709
1992	43.62
1993	41.793
1994	40.635
1995	39.966
1996	38.585
1997	38.362
1998	37.204
1999	37.694
2000	37.885
2001	38.066
2002	38.252
2003	38.429
2004	38.82
2005	38.554
2006	38.273
2007	37.938
2008	37.613
2009	37.621
2010	37.884
2011	38.147
2012	38.414
2013	38.676
2014	38.937
2015	39.196
2016	39.456
2017	39.092
2018	38.698
2019	38.324
2020	37.793
2021	37.556
2022	38.29
2023	38.442