Year	% (modeled ILO estimate)
1991	33.496
1992	32.885
1993	32.737
1994	32.489
1995	32.098
1996	32.04
1997	31.882
1998	31.724
1999	31.547
2000	31.34
2001	31.017
2002	30.768
2003	30.511
2004	30.119
2005	29.783
2006	29.489
2007	29.296
2008	29.04
2009	28.959
2010	29.024
2011	29.12
2012	29.217
2013	29.279
2014	29.267
2015	29.271
2016	29.238
2017	29.158
2018	26.381
2019	25.686
2020	24.785
2021	23.799
2022	25.802
2023	26.028