Year	% (modeled ILO estimate)
1991	43.256
1992	43.244
1993	43.207
1994	43.162
1995	43.125
1996	43.071
1997	43.031
1998	43.007
1999	43.003
2000	43.007
2001	43.041
2002	43.098
2003	43.164
2004	43.235
2005	43.311
2006	43.259
2007	43.216
2008	43.178
2009	43.153
2010	43.133
2011	43.178
2012	43.244
2013	43.308
2014	43.374
2015	42.924
2016	42.472
2017	42.021
2018	40.493
2019	38.965
2020	36.711
2021	36.263
2022	32.333
2023	31.268