Year	% (modeled ILO estimate)
1991	53.08
1992	53.11
1993	53.14
1994	53.17
1995	53.2
1996	53.23
1997	53.26
1998	53.29
1999	48.4
2000	41.77
2001	38.01
2002	35.98
2003	35.68
2004	32.01
2005	29.64
2006	29.14
2007	31.64
2008	34.6
2009	32.66
2010	31.32
2011	32.06
2012	32.37
2013	35.78
2014	38.59
2015	36.72
2016	38.68
2017	37.79
2018	38.76
2019	38.91
2020	38.86
2021	38.15
2022	36.494
2023	34.548