| 年份 | 塞拉利昂 |
|---|---|
| 2023 | - |
| 2022 | 4.80678 |
| 2021 | 4.74806 |
| 2020 | 4.6946 |
| 2019 | 4.64597 |
| 2018 | 4.59713 |
| 2017 | 4.54871 |
| 2016 | 4.50455 |
| 2015 | 4.46214 |
| 2014 | 4.42193 |
| 2013 | 4.38931 |
| 2012 | 4.36638 |
| 2011 | 4.34784 |
| 2010 | 4.3308 |
| 2009 | 4.31641 |
| 2008 | 4.30294 |
| 2007 | 4.28513 |
| 2006 | 4.26468 |
| 2005 | 4.24409 |
| 2004 | 4.21903 |
| 2003 | 4.19234 |
| 2002 | 4.16955 |
| 2001 | 4.14952 |
| 2000 | 4.12939 |
| 1999 | 4.11386 |
| 1998 | 4.09711 |
| 1997 | 4.07543 |
| 1996 | 4.05682 |
| 1995 | 4.04628 |
| 1994 | 4.02158 |
| 1993 | 3.99846 |
| 1992 | 4.04308 |
| 1991 | 4.13469 |
| 1990 | 4.22457 |
| 1989 | 4.34261 |
| 1988 | 4.4652 |
| 1987 | 4.51642 |
| 1986 | 4.5171 |
| 1985 | 4.5154 |
| 1984 | 4.51538 |
| 1983 | 4.52843 |
| 1982 | 4.55588 |
| 1981 | 4.59089 |
| 1980 | 4.62618 |
| 1979 | 4.65961 |
| 1978 | 4.69015 |
| 1977 | 4.71684 |
| 1976 | 4.74281 |
| 1975 | 4.77076 |
| 1974 | 4.79854 |
| 1973 | 4.82253 |
| 1972 | 4.8444 |
| 1971 | 4.86832 |
| 1970 | 4.89526 |
| 1969 | 4.92341 |
| 1968 | 4.95112 |
| 1967 | 4.97793 |
| 1966 | 5.00285 |
| 1965 | 5.02538 |
| 1964 | 5.0464 |
| 1963 | 5.06592 |
| 1962 | 5.08336 |
| 1961 | 5.09856 |
| 1960 | 5.1113 |