Year	% (modeled ILO estimate)
1991	61.376
1992	60.099
1993	58.789
1994	57.34
1995	55.734
1996	54.28
1997	52.693
1998	50.968
1999	49.188
2000	47.376
2001	45.966
2002	44.504
2003	43.033
2004	41.689
2005	40.54
2006	39.708
2007	39.066
2008	38.567
2009	35.651
2010	30.866
2011	32.199
2012	32.151
2013	31.956
2014	31.147
2015	34.119
2016	34.524
2017	34.559
2018	32.899
2019	32.37
2020	28.614
2021	28.336
2022	32.876
2023	33.771