Year	% (modeled ILO estimate)
1991	59.463
1992	57.604
1993	55.743
1994	53.881
1995	51.941
1996	50.772
1997	49.576
1998	48.377
1999	47.169
2000	45.954
2001	44.529
2002	43.129
2003	41.746
2004	40.372
2005	38.974
2006	37.558
2007	36.158
2008	34.748
2009	33.226
2010	34.804
2011	36.321
2012	37.823
2013	39.335
2014	40.98
2015	42.801
2016	44.747
2017	46.04
2018	48.064
2019	50.623
2020	44.46
2021	45.631
2022	44.212
2023	44.703