Year	% (modeled ILO estimate)
1991	38.714
1992	37.792
1993	36.931
1994	36.086
1995	35.898
1996	35.699
1997	36.021
1998	36.099
1999	38.162
2000	40.074
2001	38.239
2002	37.576
2003	37.043
2004	38.64
2005	40.161
2006	41.828
2007	42.958
2008	44.001
2009	44.575
2010	41.29
2011	41.838
2012	42.643
2013	43.14
2014	43.584
2015	43.933
2016	44.292
2017	44.703
2018	45.391
2019	45.728
2020	44.075
2021	43.761
2022	44.321
2023	44.297