Year	% (modeled ILO estimate)
1991	40.09
1992	39.43
1993	38.16
1994	39.21
1995	38.58
1996	37.15
1997	37.05
1998	37.07
1999	37.66
2000	39.45
2001	37.2
2002	38.48
2003	39.18
2004	39.79
2005	43.05
2006	43.96
2007	43.39
2008	43.74
2009	41.73
2010	40.24
2011	39.21
2012	37.65
2013	35.89
2014	34
2015	33.19
2016	31.28
2017	31.48
2018	30.77
2019	30.73
2020	27.48
2021	29.93
2022	30.8
2023	30.929