Year	% (modeled ILO estimate)
1991	43.092
1992	31.259
1993	33.743
1994	36.201
1995	38.774
1996	38.95
1997	37.732
1998	34.248
1999	32.926
2000	33.602
2001	32.605
2002	32.623
2003	31.035
2004	29.322
2005	27.398
2006	25.566
2007	23.491
2008	21.232
2009	21.49
2010	18.796
2011	29.064
2012	21.397
2013	13.986
2014	13.794
2015	13.794
2016	17.407
2017	18.39
2018	20.667
2019	22.214
2020	19.322
2021	20.002
2022	20.224
2023	20.386