Year	% (modeled ILO estimate)
1991	52.951
1992	54.753
1993	54.178
1994	53.727
1995	53.442
1996	52.351
1997	50.915
1998	49.375
1999	47.997
2000	46.46
2001	43.649
2002	41.685
2003	41.559
2004	38.599
2005	40.424
2006	37.575
2007	34.19
2008	31.095
2009	30.602
2010	28.636
2011	28.361
2012	28.714
2013	29.658
2014	31.154
2015	32.566
2016	34.953
2017	36.757
2018	38.494
2019	41.595
2020	39.266
2021	40.298
2022	40.259
2023	40.377