Year	% (modeled ILO estimate)
1991	45.104
1992	44.498
1993	44.494
1994	44.435
1995	43.388
1996	42.697
1997	42.029
1998	41.348
1999	40.658
2000	39.826
2001	39.119
2002	38.011
2003	36.983
2004	35.873
2005	35.701
2006	35.51
2007	34.632
2008	33.979
2009	33.712
2010	32.312
2011	31.428
2012	30.593
2013	29.766
2014	28.964
2015	28.7
2016	29.981
2017	30.598
2018	30.629
2019	30.716
2020	27.9
2021	28.571
2022	28.598
2023	29.116