| 年份 | 塞拉利昂  | 
                                                            
|---|---|
| 2023 | - | 
| 2022 | 5.7668 | 
| 2021 | 5.70334 | 
| 2020 | 5.64321 | 
| 2019 | 5.58915 | 
| 2018 | 5.54323 | 
| 2017 | 5.50315 | 
| 2016 | 5.46661 | 
| 2015 | 5.4345 | 
| 2014 | 5.40627 | 
| 2013 | 5.37675 | 
| 2012 | 5.34752 | 
| 2011 | 5.32309 | 
| 2010 | 5.29981 | 
| 2009 | 5.27739 | 
| 2008 | 5.26145 | 
| 2007 | 5.2535 | 
| 2006 | 5.24775 | 
| 2005 | 5.24173 | 
| 2004 | 5.23624 | 
| 2003 | 5.23162 | 
| 2002 | 5.22344 | 
| 2001 | 5.21231 | 
| 2000 | 5.19965 | 
| 1999 | 5.18003 | 
| 1998 | 5.15406 | 
| 1997 | 5.12735 | 
| 1996 | 5.10105 | 
| 1995 | 5.07289 | 
| 1994 | 5.04464 | 
| 1993 | 5.01421 | 
| 1992 | 4.9834 | 
| 1991 | 4.95706 | 
| 1990 | 4.93854 | 
| 1989 | 4.90259 | 
| 1988 | 4.8848 | 
| 1987 | 4.95302 | 
| 1986 | 5.06661 | 
| 1985 | 5.18426 | 
| 1984 | 5.33713 | 
| 1983 | 5.47948 | 
| 1982 | 5.52471 | 
| 1981 | 5.51527 | 
| 1980 | 5.50298 | 
| 1979 | 5.49324 | 
| 1978 | 5.49966 | 
| 1977 | 5.52326 | 
| 1976 | 5.55615 | 
| 1975 | 5.59037 | 
| 1974 | 5.62281 | 
| 1973 | 5.65108 | 
| 1972 | 5.6752 | 
| 1971 | 5.70055 | 
| 1970 | 5.72957 | 
| 1969 | 5.7596 | 
| 1968 | 5.78719 | 
| 1967 | 5.81314 | 
| 1966 | 5.8392 | 
| 1965 | 5.86585 | 
| 1964 | 5.89248 | 
| 1963 | 5.91776 | 
| 1962 | 5.94048 | 
| 1961 | 5.96012 | 
| 1960 | 5.97625 |