Year	% (modeled ILO estimate)
1991	47.604
1992	46.864
1993	46.098
1994	45.224
1995	44.214
1996	43.343
1997	42.311
1998	41.187
1999	40.047
2000	38.912
2001	39.391
2002	39.869
2003	40.349
2004	40.829
2005	41.312
2006	41.796
2007	40.973
2008	40.156
2009	39.344
2010	38.435
2011	38.12
2012	37.807
2013	37.494
2014	37.183
2015	36.872
2016	36.562
2017	36.252
2018	35.944
2019	35.636
2020	35.242
2021	37.96
2022	38.813
2023	38.826