| 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 |