| 年份 | 塞拉利昂 |
|---|---|
| 2023 | - |
| 2022 | 3.45754 |
| 2021 | 4.1047 |
| 2020 | -1.96849 |
| 2019 | 5.25375 |
| 2018 | 3.4729 |
| 2017 | 3.7538 |
| 2016 | 6.34673 |
| 2015 | -20.4911 |
| 2014 | 4.55925 |
| 2013 | 21.079 |
| 2012 | 15.2017 |
| 2011 | 6.00983 |
| 2010 | 6.63749 |
| 2009 | 3.20943 |
| 2008 | 5.43589 |
| 2007 | 7.97657 |
| 2006 | 4.28311 |
| 2005 | 4.3535 |
| 2004 | 6.47885 |
| 2003 | 9.48363 |
| 2002 | 26.5241 |
| 2001 | -6.34546 |
| 2000 | 6.65273 |
| 1999 | -1.97929 |
| 1998 | 1.78501 |
| 1997 | -5.87708 |
| 1996 | 1.75382 |
| 1995 | -7.99975 |
| 1994 | -1.94739 |
| 1993 | 1.37455 |
| 1992 | -19.0129 |
| 1991 | 2.35196 |
| 1990 | 3.35 |
| 1989 | 0.73 |
| 1988 | -7.08 |
| 1987 | 7.23127 |
| 1986 | 1.23605 |
| 1985 | -5.31134 |
| 1984 | 4.09303 |
| 1983 | -2.1028 |
| 1982 | 4.78176 |
| 1981 | 2.88143 |
| 1980 | 4.8435 |
| 1979 | 4.51127 |
| 1978 | 2.40633 |
| 1977 | 0.0466758 |
| 1976 | -0.449176 |
| 1975 | 1.66922 |
| 1974 | 3.49983 |
| 1973 | 2.25662 |
| 1972 | 0.900235 |
| 1971 | 3.46592 |
| 1970 | 8.62049 |
| 1969 | 8.52545 |
| 1968 | 2.01992 |
| 1967 | 0.0362816 |
| 1966 | 1.7 |
| 1965 | 7.18016 |
| 1964 | 6.68524 |
| 1963 | 1.69972 |
| 1962 | 4.54097 |
| 1961 | 1.80904 |
| 1960 | - |