| 年份 | 塞拉利昂 |
|---|---|
| 2023 | - |
| 2022 | - |
| 2021 | 9.113 |
| 2020 | 9.296 |
| 2019 | 9.065 |
| 2018 | 9.308 |
| 2017 | 9.88 |
| 2016 | 10.046 |
| 2015 | 10.712 |
| 2014 | 11.219 |
| 2013 | 11.372 |
| 2012 | 11.939 |
| 2011 | 12.481 |
| 2010 | 13.089 |
| 2009 | 13.805 |
| 2008 | 14.546 |
| 2007 | 15.345 |
| 2006 | 16.096 |
| 2005 | 16.89 |
| 2004 | 17.491 |
| 2003 | 18.104 |
| 2002 | 18.67 |
| 2001 | 19.248 |
| 2000 | 19.794 |
| 1999 | 21.883 |
| 1998 | 21.608 |
| 1997 | 21.052 |
| 1996 | 21.18 |
| 1995 | 21.967 |
| 1994 | 21.92 |
| 1993 | 21.48 |
| 1992 | 21.506 |
| 1991 | 21.667 |
| 1990 | 21.34 |
| 1989 | 21.446 |
| 1988 | 21.521 |
| 1987 | 21.601 |
| 1986 | 21.837 |
| 1985 | 21.82 |
| 1984 | 21.851 |
| 1983 | 21.974 |
| 1982 | 22.18 |
| 1981 | 22.38 |
| 1980 | 22.616 |
| 1979 | 22.875 |
| 1978 | 23.242 |
| 1977 | 23.582 |
| 1976 | 23.958 |
| 1975 | 24.362 |
| 1974 | 24.773 |
| 1973 | 25.165 |
| 1972 | 25.574 |
| 1971 | 26.024 |
| 1970 | 26.472 |
| 1969 | 26.988 |
| 1968 | 27.387 |
| 1967 | 27.785 |
| 1966 | 28.292 |
| 1965 | 28.747 |
| 1964 | 29.178 |
| 1963 | 29.599 |
| 1962 | 29.951 |
| 1961 | 30.298 |
| 1960 | 30.608 |