| 年份 | 塞拉利昂 |
|---|---|
| 2023 | - |
| 2022 | 5.42474 |
| 2021 | 5.46438 |
| 2020 | 5.51478 |
| 2019 | 5.55045 |
| 2018 | 5.57494 |
| 2017 | 5.61611 |
| 2016 | 5.66887 |
| 2015 | 5.72645 |
| 2014 | 5.8093 |
| 2013 | 5.90315 |
| 2012 | 5.95323 |
| 2011 | 5.97694 |
| 2010 | 6.00279 |
| 2009 | 6.0296 |
| 2008 | 6.06479 |
| 2007 | 6.11142 |
| 2006 | 6.16713 |
| 2005 | 6.22808 |
| 2004 | 6.29216 |
| 2003 | 6.35458 |
| 2002 | 6.41525 |
| 2001 | 6.47518 |
| 2000 | 6.53932 |
| 1999 | 6.60805 |
| 1998 | 6.68119 |
| 1997 | 6.75573 |
| 1996 | 6.82445 |
| 1995 | 6.89636 |
| 1994 | 6.97246 |
| 1993 | 7.04328 |
| 1992 | 7.10754 |
| 1991 | 7.171 |
| 1990 | 7.22734 |
| 1989 | 7.27955 |
| 1988 | 7.32826 |
| 1987 | 7.37124 |
| 1986 | 7.41043 |
| 1985 | 7.44817 |
| 1984 | 7.48422 |
| 1983 | 7.51806 |
| 1982 | 7.54814 |
| 1981 | 7.57101 |
| 1980 | 7.58895 |
| 1979 | 7.60205 |
| 1978 | 7.60834 |
| 1977 | 7.60918 |
| 1976 | 7.59922 |
| 1975 | 7.58017 |
| 1974 | 7.55688 |
| 1973 | 7.52805 |
| 1972 | 7.49326 |
| 1971 | 7.4499 |
| 1970 | 7.40166 |
| 1969 | 7.34978 |
| 1968 | 7.29014 |
| 1967 | 7.22424 |
| 1966 | 7.15307 |
| 1965 | 7.07691 |
| 1964 | 6.9886 |
| 1963 | 6.89355 |
| 1962 | 6.80889 |
| 1961 | 6.72707 |
| 1960 | 6.63688 |