Year	% (modeled ILO estimate)
1991	57.685
1992	59.346
1993	58.632
1994	57.978
1995	57.547
1996	56.567
1997	55.328
1998	54.032
1999	52.832
2000	51.487
2001	48.874
2002	44.914
2003	44.498
2004	42.434
2005	42.248
2006	37.461
2007	35.424
2008	32.412
2009	28.869
2010	21.609
2011	29.317
2012	30.2
2013	30.834
2014	33.039
2015	34.425
2016	36.456
2017	38.161
2018	39.594
2019	42.601
2020	40.88
2021	41.34
2022	41.176
2023	41.424