Year	% (modeled ILO estimate)
1991	54.947
1992	53.164
1993	49.697
1994	45.772
1995	44.108
1996	42.356
1997	39.441
1998	40.457
1999	32.159
2000	29.532
2001	30.873
2002	31.816
2003	34.98
2004	38.544
2005	43.098
2006	42.928
2007	35.817
2008	35.195
2009	34.623
2010	36.477
2011	31.405
2012	32.813
2013	33.433
2014	37.468
2015	38.2
2016	39.879
2017	39.853
2018	40.023
2019	39.94
2020	38.274
2021	38.873
2022	39.275
2023	39.129