Year	% (modeled ILO estimate)
1991	49.034
1992	48.593
1993	48.185
1994	47.795
1995	47.428
1996	47.098
1997	46.794
1998	46.514
1999	46.247
2000	45.977
2001	45.687
2002	45.004
2003	44.289
2004	43.534
2005	42.741
2006	41.919
2007	41.065
2008	40.185
2009	39.283
2010	38.382
2011	37.482
2012	36.48
2013	35.483
2014	34.509
2015	32.907
2016	31.368
2017	29.883
2018	31.582
2019	37.885
2020	34.575
2021	39.095
2022	39.402
2023	39.152