Year	% (modeled ILO estimate)
1991	36.479
1992	36.213
1993	34.41
1994	35.192
1995	33.882
1996	32.771
1997	32.03
1998	32.631
1999	32.869
2000	35.729
2001	33.61
2002	33.83
2003	33.51
2004	34.026
2005	35.02
2006	34.7
2007	33.87
2008	33.4
2009	32.44
2010	32.51
2011	31.98
2012	31.48
2013	30.99
2014	30.19
2015	30
2016	28.46
2017	28.075
2018	29.628
2019	30.98
2020	28.427
2021	30.257
2022	31.1
2023	31.452