Year	% (modeled ILO estimate)
1991	51.381
1992	49.336
1993	47.427
1994	46.21
1995	45.053
1996	43.333
1997	41.82
1998	40.616
1999	37.678
2000	36.776
2001	39.106
2002	36.821
2003	37.657
2004	37.524
2005	37.106
2006	37.591
2007	37.738
2008	38.188
2009	35.08
2010	34.158
2011	30.627
2012	28.48
2013	23.829
2014	26.015
2015	25.641
2016	26.497
2017	27.639
2018	31.342
2019	32.422
2020	31.344
2021	34.782
2022	34.422
2023	36.179