Year	% (modeled ILO estimate)
1991	35.613
1992	33.278
1993	31.067
1994	28.841
1995	28.17
1996	27.584
1997	26.733
1998	25.475
1999	26.113
2000	26.529
2001	24.09
2002	22.653
2003	21.494
2004	23.934
2005	26.193
2006	28.543
2007	28.152
2008	27.661
2009	26.692
2010	25.042
2011	24.816
2012	24.855
2013	24.599
2014	24.312
2015	23.959
2016	23.637
2017	23.378
2018	23.365
2019	23.062
2020	20.603
2021	21.073
2022	21.92
2023	21.894