Year	% (modeled ILO estimate)
1991	56.091
1992	56.182
1993	56.364
1994	57.036
1995	56.809
1996	56.718
1997	57.209
1998	57.582
1999	57.191
2000	57.273
2001	56.364
2002	55.509
2003	53.845
2004	53.327
2005	53.255
2006	52.6
2007	52
2008	51.364
2009	50.209
2010	48.682
2011	48.436
2012	48.364
2013	48.618
2014	48.709
2015	48.9
2016	48.9
2017	49.336
2018	49.564
2019	50.136
2020	48.373
2021	49.573
2022	49.673
2023	50.747