Year	% (modeled ILO estimate)
1991	42.029
1992	40.394
1993	40.71
1994	38.805
1995	39.191
1996	35.844
1997	35.36
1998	32.983
1999	32.304
2000	36.059
2001	36.108
2002	31.911
2003	37.081
2004	29.756
2005	30.838
2006	27.453
2007	27.607
2008	29.817
2009	29.285
2010	30.828
2011	32.037
2012	34.07
2013	31.565
2014	32.194
2015	34.317
2016	32.187
2017	36.445
2018	35.149
2019	32.848
2020	33.387
2021	33.362
2022	31.576
2023	31.364