Year	% (modeled ILO estimate)
1991	42.274
1992	42.113
1993	41.991
1994	41.673
1995	41.748
1996	40.47
1997	39.688
1998	35.987
1999	35.732
2000	35.169
2001	36.992
2002	37.537
2003	37.626
2004	38.102
2005	36.833
2006	33.854
2007	30.483
2008	28.877
2009	27.31
2010	27.966
2011	27.882
2012	28.783
2013	28.637
2014	30.124
2015	31.906
2016	32.082
2017	31.627
2018	31.75
2019	30.752
2020	29.388
2021	31.561
2022	32.839
2023	31.398