Year	% (modeled ILO estimate)
1991	57.633
1992	57.494
1993	56.676
1994	55.671
1995	55.636
1996	55.545
1997	54.914
1998	56.009
1999	52.877
2000	52.248
2001	51.608
2002	49.216
2003	48.841
2004	48.58
2005	50.612
2006	51.064
2007	43.54
2008	45.776
2009	48.102
2010	51.224
2011	47.264
2012	49.773
2013	50.223
2014	52.385
2015	52.782
2016	53.564
2017	53.566
2018	53.457
2019	53.548
2020	52.266
2021	53.278
2022	53.52
2023	53.362