Year	% (modeled ILO estimate)
1991	47.716
1992	47.552
1993	47.381
1994	47.266
1995	47.365
1996	47.259
1997	47.091
1998	47.024
1999	47.138
2000	47.186
2001	47.329
2002	47.652
2003	47.46
2004	47.269
2005	45.255
2006	45.501
2007	44.019
2008	42.547
2009	42.378
2010	41.042
2011	40.914
2012	40.508
2013	40.081
2014	38.58
2015	38.703
2016	38.827
2017	38.952
2018	39.405
2019	38.996
2020	33.09
2021	37.008
2022	37.434
2023	37.728