Year	% (modeled ILO estimate)
1991	43.639
1992	43.245
1993	42.594
1994	42.465
1995	42.321
1996	41.962
1997	41.549
1998	40.932
1999	40.359
2000	39.788
2001	39.267
2002	38.893
2003	38.572
2004	38.274
2005	37.94
2006	37.628
2007	37.276
2008	37.381
2009	37.528
2010	37.824
2011	38.192
2012	38.618
2013	38.904
2014	39.157
2015	39.374
2016	39.521
2017	39.469
2018	39.408
2019	39.378
2020	37.879
2021	38.192
2022	39.343
2023	39.659