Year	% (modeled ILO estimate)
1991	42.736
1992	41.339
1993	39.871
1994	38.26
1995	37.26
1996	36.266
1997	35.349
1998	34.051
1999	32.869
2000	30.74
2001	30.044
2002	29.337
2003	28.723
2004	28.004
2005	27.365
2006	26.341
2007	25.222
2008	25.876
2009	26.275
2010	27.274
2011	27.521
2012	28.271
2013	28.374
2014	28.028
2015	28.106
2016	28.076
2017	28.067
2018	28.096
2019	28.531
2020	26.729
2021	26.816
2022	27.489
2023	27.303