Year	% (modeled ILO estimate)
1991	34.987
1992	35.107
1993	35.017
1994	34.991
1995	36.785
1996	38.222
1997	34.486
1998	32.604
1999	37.887
2000	37.445
2001	36.21
2002	35.285
2003	31.482
2004	34.704
2005	36.76
2006	39.279
2007	40.731
2008	44.662
2009	42.476
2010	40.095
2011	38.059
2012	36.887
2013	32.512
2014	32.751
2015	32.983
2016	33.557
2017	33.882
2018	36.547
2019	36.215
2020	31.835
2021	32.537
2022	42.128
2023	41.812