Year	% (modeled ILO estimate)
1991	47.034
1992	47.259
1993	47.483
1994	47.706
1995	47.927
1996	48.148
1997	48.369
1998	48.588
1999	48.807
2000	49.026
2001	49.247
2002	48.607
2003	47.971
2004	47.337
2005	46.704
2006	46.074
2007	45.446
2008	44.819
2009	44.194
2010	43.57
2011	42.948
2012	42.336
2013	41.725
2014	41.116
2015	40.509
2016	39.904
2017	39.299
2018	40.66
2019	39.282
2020	38.498
2021	38.257
2022	38.532
2023	38.35