Year	% (modeled ILO estimate)
1991	60.931
1992	59.982
1993	59.135
1994	58.582
1995	57.573
1996	56.528
1997	55.148
1998	53.926
1999	52.725
2000	51.498
2001	49.809
2002	48.242
2003	46.561
2004	45.385
2005	44.039
2006	42.759
2007	41.515
2008	40.151
2009	38.582
2010	39.867
2011	38.112
2012	36.461
2013	34.758
2014	33.009
2015	31.344
2016	29.776
2017	28.205
2018	27.841
2019	28.11
2020	24.609
2021	25.596
2022	25.249
2023	25.384