Year	% (modeled ILO estimate)
1991	27.469
1992	27.345
1993	27.267
1994	26.631
1995	25.918
1996	25.121
1997	24.285
1998	23.416
1999	22.685
2000	21.919
2001	21.186
2002	20.436
2003	19.693
2004	21.035
2005	22.488
2006	24.006
2007	23.599
2008	23.228
2009	22.788
2010	22.381
2011	21.981
2012	21.619
2013	21.226
2014	20.786
2015	20.393
2016	20.075
2017	19.734
2018	19.379
2019	19.638
2020	18.735
2021	19.476
2022	19.443
2023	19.481