Year	% (modeled ILO estimate)
1991	44.73
1992	44.436
1993	44.142
1994	43.847
1995	43.554
1996	43.261
1997	42.994
1998	40.881
1999	38.801
2000	37.613
2001	36.609
2002	35.619
2003	35.292
2004	34.314
2005	33.35
2006	35.74
2007	35.98
2008	35.86
2009	34.979
2010	32.358
2011	32.178
2012	33.33
2013	33.239
2014	32.349
2015	33.058
2016	31.496
2017	32.759
2018	31.461
2019	32.046
2020	30.911
2021	28.062
2022	28.413
2023	28.305