Year	% (modeled ILO estimate)
1991	54.174
1992	53.498
1993	52.567
1994	51.544
1995	50.582
1996	49.605
1997	48.671
1998	47.729
1999	45.743
2000	44.709
2001	44.838
2002	44.992
2003	45.192
2004	45.375
2005	45.531
2006	45.667
2007	45.047
2008	44.576
2009	43.952
2010	43.506
2011	44.07
2012	44.561
2013	44.931
2014	42.158
2015	39.243
2016	40.664
2017	42.342
2018	41.974
2019	41.574
2020	40.719
2021	40.519
2022	40.269
2023	40.226