Year	% (modeled ILO estimate)
1991	57.255
1992	57.108
1993	56.828
1994	56.988
1995	57.071
1996	57.191
1997	57.034
1998	56.778
1999	56.56
2000	56.225
2001	56.233
2002	56.21
2003	56.263
2004	56.206
2005	56.071
2006	56.024
2007	56.263
2008	56.597
2009	56.844
2010	57.106
2011	57.319
2012	57.263
2013	57.185
2014	57.087
2015	56.971
2016	56.448
2017	55.898
2018	55.78
2019	55.658
2020	54.896
2021	55.062
2022	55.643
2023	55.777