Year	% (modeled ILO estimate)
1991	40.15
1992	41.114
1993	41.523
1994	41.486
1995	41.094
1996	40.877
1997	40.494
1998	40.136
1999	39.821
2000	39.649
2001	39.324
2002	38.859
2003	37.712
2004	37.218
2005	36.666
2006	36.126
2007	35.188
2008	33.624
2009	31.479
2010	30.641
2011	33.707
2012	34.149
2013	33.263
2014	31.35
2015	29.671
2016	26.845
2017	26.858
2018	29.744
2019	35.182
2020	33.919
2021	29.475
2022	31.297
2023	31.882