Year	% (modeled ILO estimate)
1991	40.619
1992	40.37
1993	38.3
1994	37.89
1995	35.57
1996	34.58
1997	31.97
1998	32.04
1999	31.37
2000	34.85
2001	36.7
2002	34.01
2003	31.87
2004	31.24
2005	31.79
2006	30.69
2007	29.34
2008	29.57
2009	29.4
2010	29.63
2011	28.08
2012	28.36
2013	27.91
2014	28.66
2015	26.94
2016	28.95
2017	29.66
2018	30.73
2019	30.98
2020	27.38
2021	26.09
2022	26.4
2023	27.582