Year	% (modeled ILO estimate)
1991	47.819
1992	47.231
1993	46.024
1994	45.518
1995	45.315
1996	44.819
1997	44.405
1998	45.428
1999	44.109
2000	43.358
2001	42.609
2002	38.919
2003	39.477
2004	39.111
2005	39.006
2006	38.9
2007	36.64
2008	37.154
2009	35.635
2010	39.208
2011	36.72
2012	37.84
2013	36.243
2014	37.664
2015	40.616
2016	39.47
2017	38.321
2018	38.16
2019	38.251
2020	36.076
2021	38.041
2022	37.751
2023	35.607