Year	% (modeled ILO estimate)
1991	34.223
1992	32.791
1993	30.598
1994	35.983
1995	36.775
1996	37.049
1997	42.628
1998	38.324
1999	34.805
2000	34.657
2001	34.163
2002	34.312
2003	33.662
2004	38.79
2005	37.976
2006	39.225
2007	43.294
2008	43.048
2009	39.073
2010	37.588
2011	35.663
2012	30.434
2013	29.721
2014	29.559
2015	32.066
2016	30.958
2017	38.43
2018	38.779
2019	36.209
2020	29.594
2021	31.933
2022	34.925
2023	36.547