| 年份 | 塞拉利昂  | 
                                                            
|---|---|
| 2023 | - | 
| 2022 | 14.0697 | 
| 2021 | 14.2464 | 
| 2020 | 14.4103 | 
| 2019 | 14.5847 | 
| 2018 | 14.7875 | 
| 2017 | 15.0271 | 
| 2016 | 15.2985 | 
| 2015 | 15.5821 | 
| 2014 | 15.8596 | 
| 2013 | 16.1128 | 
| 2012 | 16.3263 | 
| 2011 | 16.5099 | 
| 2010 | 16.6771 | 
| 2009 | 16.8242 | 
| 2008 | 16.9823 | 
| 2007 | 17.1729 | 
| 2006 | 17.3655 | 
| 2005 | 17.5448 | 
| 2004 | 17.7123 | 
| 2003 | 17.8322 | 
| 2002 | 17.8894 | 
| 2001 | 17.916 | 
| 2000 | 17.9283 | 
| 1999 | 17.9015 | 
| 1998 | 17.8671 | 
| 1997 | 17.8537 | 
| 1996 | 17.8309 | 
| 1995 | 17.802 | 
| 1994 | 17.7697 | 
| 1993 | 17.7373 | 
| 1992 | 17.7248 | 
| 1991 | 17.7322 | 
| 1990 | 17.7455 | 
| 1989 | 17.7587 | 
| 1988 | 17.7595 | 
| 1987 | 17.7378 | 
| 1986 | 17.7033 | 
| 1985 | 17.669 | 
| 1984 | 17.6393 | 
| 1983 | 17.6194 | 
| 1982 | 17.6063 | 
| 1981 | 17.5969 | 
| 1980 | 17.5948 | 
| 1979 | 17.5938 | 
| 1978 | 17.5766 | 
| 1977 | 17.548 | 
| 1976 | 17.5234 | 
| 1975 | 17.495 | 
| 1974 | 17.4606 | 
| 1973 | 17.4367 | 
| 1972 | 17.4282 | 
| 1971 | 17.4198 | 
| 1970 | 17.4072 | 
| 1969 | 17.3933 | 
| 1968 | 17.3698 | 
| 1967 | 17.3203 | 
| 1966 | 17.2534 | 
| 1965 | 17.1769 | 
| 1964 | 17.0754 | 
| 1963 | 16.9558 | 
| 1962 | 16.8348 | 
| 1961 | 16.7113 | 
| 1960 | 16.5824 |