Year	% (modeled ILO estimate)
1991	41.115
1992	40.97
1993	40.829
1994	40.758
1995	40.673
1996	40.587
1997	40.381
1998	39.33
1999	38.063
2000	36.651
2001	36.238
2002	36.325
2003	36.08
2004	36.91
2005	36.667
2006	37.329
2007	40.026
2008	41.015
2009	41.716
2010	40.465
2011	38.491
2012	37.421
2013	37.109
2014	37.937
2015	38.938
2016	39.147
2017	40.117
2018	41.226
2019	41.904
2020	41.254
2021	42.076
2022	43.095
2023	44.499