| 年份 | 塞拉利昂  | 
                                                            
|---|---|
| 2023 | - | 
| 2022 | 2.641 | 
| 2021 | 2.61575 | 
| 2020 | 2.59118 | 
| 2019 | 2.56302 | 
| 2018 | 2.53196 | 
| 2017 | 2.50259 | 
| 2016 | 2.47489 | 
| 2015 | 2.44826 | 
| 2014 | 2.42396 | 
| 2013 | 2.40041 | 
| 2012 | 2.37873 | 
| 2011 | 2.3615 | 
| 2010 | 2.34995 | 
| 2009 | 2.33045 | 
| 2008 | 2.3178 | 
| 2007 | 2.34752 | 
| 2006 | 2.40164 | 
| 2005 | 2.45798 | 
| 2004 | 2.53432 | 
| 2003 | 2.6116 | 
| 2002 | 2.64295 | 
| 2001 | 2.64674 | 
| 2000 | 2.64948 | 
| 1999 | 2.65245 | 
| 1998 | 2.663 | 
| 1997 | 2.68239 | 
| 1996 | 2.70709 | 
| 1995 | 2.73294 | 
| 1994 | 2.75801 | 
| 1993 | 2.78154 | 
| 1992 | 2.80287 | 
| 1991 | 2.825 | 
| 1990 | 2.84781 | 
| 1989 | 2.87111 | 
| 1988 | 2.89345 | 
| 1987 | 2.91529 | 
| 1986 | 2.93753 | 
| 1985 | 2.9601 | 
| 1984 | 2.98252 | 
| 1983 | 3.00411 | 
| 1982 | 3.02457 | 
| 1981 | 3.04373 | 
| 1980 | 3.06133 | 
| 1979 | 3.07757 | 
| 1978 | 3.09276 | 
| 1977 | 3.10695 | 
| 1976 | 3.12049 | 
| 1975 | 3.13376 | 
| 1974 | 3.14663 | 
| 1973 | 3.15864 | 
| 1972 | 3.16936 | 
| 1971 | 3.17901 | 
| 1970 | 3.18715 | 
| 1969 | 3.19357 | 
| 1968 | 3.1989 | 
| 1967 | 3.20353 | 
| 1966 | 3.20735 | 
| 1965 | 3.21038 | 
| 1964 | 3.21278 | 
| 1963 | 3.21404 | 
| 1962 | 3.21331 | 
| 1961 | 3.21097 | 
| 1960 | 3.20701 |