| 年份 | 塞拉利昂 |
|---|---|
| 2023 | - |
| 2022 | 9.58766 |
| 2021 | 9.51005 |
| 2020 | 9.42929 |
| 2019 | 9.35157 |
| 2018 | 9.28168 |
| 2017 | 9.21212 |
| 2016 | 9.13925 |
| 2015 | 9.06896 |
| 2014 | 9.00388 |
| 2013 | 8.9462 |
| 2012 | 8.90667 |
| 2011 | 8.882 |
| 2010 | 8.86229 |
| 2009 | 8.84507 |
| 2008 | 8.82383 |
| 2007 | 8.79089 |
| 2006 | 8.75208 |
| 2005 | 8.71549 |
| 2004 | 8.68336 |
| 2003 | 8.66247 |
| 2002 | 8.65288 |
| 2001 | 8.64808 |
| 2000 | 8.64725 |
| 1999 | 8.6486 |
| 1998 | 8.63965 |
| 1997 | 8.62235 |
| 1996 | 8.60775 |
| 1995 | 8.58895 |
| 1994 | 8.56591 |
| 1993 | 8.55066 |
| 1992 | 8.54505 |
| 1991 | 8.53743 |
| 1990 | 8.52608 |
| 1989 | 8.51332 |
| 1988 | 8.49686 |
| 1987 | 8.46991 |
| 1986 | 8.43494 |
| 1985 | 8.39456 |
| 1984 | 8.34231 |
| 1983 | 8.28123 |
| 1982 | 8.21957 |
| 1981 | 8.15734 |
| 1980 | 8.0936 |
| 1979 | 8.03056 |
| 1978 | 7.96441 |
| 1977 | 7.89885 |
| 1976 | 7.84267 |
| 1975 | 7.79774 |
| 1974 | 7.72798 |
| 1973 | 7.69015 |
| 1972 | 7.78466 |
| 1971 | 7.94768 |
| 1970 | 8.11809 |
| 1969 | 8.33848 |
| 1968 | 8.5356 |
| 1967 | 8.58626 |
| 1966 | 8.55679 |
| 1965 | 8.52367 |
| 1964 | 8.49576 |
| 1963 | 8.49183 |
| 1962 | 8.5124 |
| 1961 | 8.54542 |
| 1960 | 8.57819 |