Year	% (modeled ILO estimate)
1991	37.976
1992	39.571
1993	40.155
1994	39.913
1995	39.06
1996	38.813
1997	38.327
1998	37.927
1999	37.576
2000	37.515
2001	37.206
2002	36.661
2003	35.828
2004	35.125
2005	34.451
2006	33.76
2007	33.045
2008	29.481
2009	28.982
2010	27.387
2011	27.388
2012	27.171
2013	26.966
2014	25.553
2015	24.762
2016	22.206
2017	22.121
2018	22.262
2019	28.263
2020	26.523
2021	21.467
2022	25.679
2023	26.926