Year	% (modeled ILO estimate)
1991	37.802
1992	37.138
1993	36.228
1994	34.504
1995	33.801
1996	32.652
1997	31.536
1998	31.773
1999	32.237
2000	32.505
2001	32.396
2002	32.879
2003	33.702
2004	33.374
2005	30.628
2006	30.492
2007	31.571
2008	31.184
2009	32.45
2010	31.803
2011	30.975
2012	30.35
2013	31.892
2014	31.121
2015	31.881
2016	32.172
2017	31.698
2018	32.197
2019	32.067
2020	31.338
2021	35.857
2022	38.03
2023	40.852