Year	% (modeled ILO estimate)
1991	52.668
1992	50.635
1993	48.605
1994	44.119
1995	44.385
1996	45.644
1997	45.092
1998	44.691
1999	43.398
2000	42.843
2001	43.072
2002	42.734
2003	43.502
2004	42.449
2005	42.447
2006	43.231
2007	44.176
2008	45.434
2009	43.858
2010	43.399
2011	43.311
2012	43.319
2013	43.631
2014	45.199
2015	45.272
2016	46.904
2017	48.27
2018	48.637
2019	49.188
2020	48.236
2021	51.15
2022	52.551
2023	52.931