Year	% (modeled ILO estimate)
1991	73.031
1992	71.975
1993	71.01
1994	69.755
1995	68.644
1996	67.544
1997	66.367
1998	65.093
1999	63.697
2000	62.269
2001	60.901
2002	59.464
2003	58.217
2004	56.096
2005	54.161
2006	53.171
2007	52.093
2008	50.519
2009	48.933
2010	47.546
2011	46.069
2012	44.657
2013	43.109
2014	41.58
2015	41.31
2016	41.098
2017	40.911
2018	40.721
2019	40.483
2020	39.673
2021	39.586
2022	39.889
2023	39.741