Year	% (modeled ILO estimate)
1991	45.727
1992	44.682
1993	43.955
1994	42.99
1995	42.141
1996	41.021
1997	40.104
1998	39.133
1999	37.328
2000	36.097
2001	34.935
2002	34.307
2003	33.719
2004	32.991
2005	32.701
2006	32.415
2007	32.153
2008	31.85
2009	28.046
2010	24.742
2011	26.507
2012	23.745
2013	23.63
2014	24.135
2015	25.198
2016	27.342
2017	28.534
2018	28.084
2019	29.985
2020	27.488
2021	27.295
2022	26.81
2023	27.758