Year	% (modeled ILO estimate)
1991	57.76
1992	56.834
1993	56.498
1994	56.335
1995	55.648
1996	55.22
1997	53.029
1998	51.396
1999	50.425
2000	47.686
2001	46.482
2002	45.825
2003	44.302
2004	43.72
2005	42.738
2006	43.911
2007	44.185
2008	46.934
2009	44.753
2010	44.377
2011	44.641
2012	42.41
2013	41.491
2014	41.321
2015	41.387
2016	39.806
2017	38.337
2018	36.823
2019	34.016
2020	30.704
2021	30.616
2022	33.392
2023	33.636