| 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 |