Year	% (modeled ILO estimate)
1991	31.363
1992	30.367
1993	29.463
1994	27.97
1995	25.392
1996	23.735
1997	24.264
1998	25.483
1999	27.205
2000	27.079
2001	28.258
2002	28.142
2003	27.7
2004	26.842
2005	26.52
2006	26.063
2007	27.488
2008	27.949
2009	28.615
2010	27.373
2011	30.029
2012	29.743
2013	31.293
2014	31.047
2015	32.398
2016	32.588
2017	33.178
2018	33.706
2019	36.373
2020	36.66
2021	36.609
2022	36.888
2023	37.253