Year	% (modeled ILO estimate)
1991	38.928
1992	38.362
1993	37.8
1994	37.242
1995	36.689
1996	36.816
1997	36.94
1998	37.063
1999	37.187
2000	37.311
2001	36.687
2002	36.068
2003	35.448
2004	34.824
2005	34.176
2006	33.535
2007	32.906
2008	32.247
2009	31.49
2010	32.924
2011	34.354
2012	35.798
2013	37.268
2014	38.814
2015	40.461
2016	42.194
2017	43.274
2018	44.375
2019	45.49
2020	40.22
2021	41.22
2022	40.089
2023	40.704