Year	% (modeled ILO estimate)
1991	49.587
1992	49.228
1993	49.074
1994	49.054
1995	48.814
1996	48.654
1997	48.104
1998	47.842
1999	47.822
2000	47.219
2001	46.885
2002	47.181
2003	47.69
2004	48.436
2005	49.183
2006	49.93
2007	50.678
2008	51.425
2009	52.171
2010	52.916
2011	53.66
2012	54.403
2013	55.143
2014	55.882
2015	56.617
2016	57.35
2017	57.811
2018	58.123
2019	58.59
2020	54.896
2021	55.265
2022	55.002
2023	56.504