Year	% (modeled ILO estimate)
1991	56.614
1992	56.137
1993	56.115
1994	55.24
1995	54.395
1996	51.469
1997	50.883
1998	49.192
1999	48.709
2000	48.58
2001	48.45
2002	49.3
2003	48.482
2004	50.093
2005	50.404
2006	50.236
2007	50.69
2008	51.062
2009	49.295
2010	48.613
2011	47.726
2012	48.067
2013	47.181
2014	46.578
2015	44.253
2016	40.525
2017	40.059
2018	40.487
2019	41.614
2020	35.894
2021	39.335
2022	44.729
2023	44.824