Year	% (modeled ILO estimate)
1991	56.365
1992	55.783
1993	54.945
1994	54.125
1995	53.101
1996	52.633
1997	51.896
1998	51.156
1999	50.2
2000	49.155
2001	48.188
2002	47.109
2003	46.039
2004	44.829
2005	43.832
2006	42.678
2007	41.636
2008	40.558
2009	39.155
2010	38.029
2011	36.819
2012	35.949
2013	34.648
2014	34.106
2015	33.489
2016	33.323
2017	32.827
2018	32.379
2019	31.967
2020	30.5
2021	30.391
2022	31.186
2023	31.435