Year	% (modeled ILO estimate)
1991	56.036
1992	55.093
1993	54.777
1994	54.29
1995	54.779
1996	52.27
1997	47.927
1998	46.768
1999	48.448
2000	51.786
2001	49.408
2002	46.604
2003	45.888
2004	40.361
2005	42.865
2006	45.481
2007	48.292
2008	46.33
2009	41.788
2010	39.1
2011	35.663
2012	35.381
2013	30.613
2014	31.09
2015	32.073
2016	32.915
2017	33.605
2018	35.88
2019	36.197
2020	28.715
2021	31.864
2022	39.934
2023	39.439