Year	% (modeled ILO estimate)
1991	40.618
1992	40.592
1993	40.523
1994	40.512
1995	40.553
1996	40.611
1997	40.643
1998	40.679
1999	40.719
2000	39.943
2001	39.175
2002	38.464
2003	37.769
2004	37.144
2005	36.586
2006	36.057
2007	35.565
2008	35.098
2009	34.685
2010	34.334
2011	33.433
2012	32.736
2013	32.096
2014	31.639
2015	26.045
2016	26.105
2017	26.233
2018	26.655
2019	26.881
2020	26.381
2021	25.987
2022	26.926
2023	27.042