Year	% (modeled ILO estimate)
1991	59.683
1992	59.285
1993	58.802
1994	58.135
1995	57.332
1996	57.071
1997	56.606
1998	56.01
1999	55.351
2000	54.656
2001	54.209
2002	53.663
2003	53.168
2004	52.69
2005	52.266
2006	52.049
2007	49.87
2008	47.708
2009	45.567
2010	43.452
2011	41.365
2012	39.31
2013	37.293
2014	35.314
2015	33.376
2016	41.387
2017	31.914
2018	35.239
2019	41.324
2020	40.958
2021	40.681
2022	40.337
2023	40.058