Year	% (modeled ILO estimate)
1991	39.743
1992	38.663
1993	37.599
1994	36.553
1995	35.525
1996	34.495
1997	33.488
1998	32.503
1999	31.542
2000	30.602
2001	31.079
2002	31.559
2003	32.043
2004	32.53
2005	33.021
2006	32.908
2007	32.93
2008	32.814
2009	32.876
2010	32.501
2011	32.738
2012	32.532
2013	32.562
2014	32.618
2015	32.504
2016	32.335
2017	32.21
2018	32.027
2019	31.53
2020	30.925
2021	30.81
2022	30.647
2023	30.679