Year	% (modeled ILO estimate)
1991	42.957
1992	44.312
1993	44.779
1994	42.55
1995	41.044
1996	39.352
1997	39.858
1998	39.523
1999	36.053
2000	36.408
2001	36.972
2002	33.516
2003	32.296
2004	34.286
2005	37.821
2006	38.595
2007	38.417
2008	38.426
2009	37.622
2010	35.708
2011	34.95
2012	34.236
2013	32.32
2014	31.827
2015	31.307
2016	30.801
2017	29.242
2018	27.667
2019	24.934
2020	21.887
2021	22.838
2022	23.257
2023	24.042