Year	% (modeled ILO estimate)
1991	50.914
1992	50.857
1993	50.742
1994	50.563
1995	50.314
1996	50.388
1997	50.445
1998	50.419
1999	50.291
2000	50.039
2001	50.391
2002	50.583
2003	50.607
2004	50.64
2005	50.609
2006	51.074
2007	51.474
2008	51.766
2009	51.949
2010	51.931
2011	52.755
2012	53.44
2013	53.672
2014	54.03
2015	54.298
2016	53.791
2017	53.152
2018	52.411
2019	51.609
2020	51.12
2021	50.951
2022	51.695
2023	51.958