Year	% (modeled ILO estimate)
1991	50.221
1992	47.986
1993	47.298
1994	49.97
1995	43.207
1996	43.921
1997	43.857
1998	49.176
1999	47.374
2000	43.489
2001	42.592
2002	41.701
2003	40.816
2004	39.937
2005	39.064
2006	38.198
2007	37.339
2008	36.487
2009	35.642
2010	34.803
2011	33.747
2012	33.398
2013	32.888
2014	31.346
2015	33.401
2016	32.513
2017	32.774
2018	29.892
2019	30.503
2020	28.911
2021	29.883
2022	30.924
2023	30.994