Year	% (modeled ILO estimate)
1991	45.181
1992	46.212
1993	47.057
1994	46.965
1995	46.89
1996	46.79
1997	46.735
1998	46.689
1999	46.685
2000	46.693
2001	46.732
2002	46.711
2003	46.784
2004	46.872
2005	46.894
2006	46.905
2007	46.959
2008	47.048
2009	47.141
2010	47.224
2011	47.138
2012	47.177
2013	46.087
2014	44.99
2015	43.886
2016	42.772
2017	41.651
2018	40.524
2019	40.25
2020	39.469
2021	39.593
2022	39.27
2023	39.422