Year	% (modeled ILO estimate)
1991	55.364
1992	55.761
1993	55.178
1994	54.618
1995	53.684
1996	52.959
1997	53.796
1998	53.1
1999	52.044
2000	51.395
2001	50.57
2002	50.115
2003	47.174
2004	44.247
2005	41.354
2006	38.514
2007	35.746
2008	33.067
2009	34.632
2010	33.611
2011	44.1
2012	36.162
2013	27.534
2014	28.936
2015	31.266
2016	31.633
2017	31.583
2018	35.669
2019	36.584
2020	33.769
2021	34.568
2022	34.155
2023	33.815