| 年份 | 塞拉利昂 |
|---|---|
| 2023 | - |
| 2022 | 3.14349 |
| 2021 | 3.11435 |
| 2020 | 3.08678 |
| 2019 | 3.05984 |
| 2018 | 3.0319 |
| 2017 | 3.00096 |
| 2016 | 2.96801 |
| 2015 | 2.9349 |
| 2014 | 2.89988 |
| 2013 | 2.86424 |
| 2012 | 2.83142 |
| 2011 | 2.80126 |
| 2010 | 2.77271 |
| 2009 | 2.7468 |
| 2008 | 2.72196 |
| 2007 | 2.69903 |
| 2006 | 2.68102 |
| 2005 | 2.66995 |
| 2004 | 2.65135 |
| 2003 | 2.63485 |
| 2002 | 2.66322 |
| 2001 | 2.72241 |
| 2000 | 2.78325 |
| 1999 | 2.87121 |
| 1998 | 2.97254 |
| 1997 | 3.02079 |
| 1996 | 3.02848 |
| 1995 | 3.03467 |
| 1994 | 3.04153 |
| 1993 | 3.05702 |
| 1992 | 3.0825 |
| 1991 | 3.11367 |
| 1990 | 3.14285 |
| 1989 | 3.17024 |
| 1988 | 3.19548 |
| 1987 | 3.21837 |
| 1986 | 3.24103 |
| 1985 | 3.26458 |
| 1984 | 3.28733 |
| 1983 | 3.30733 |
| 1982 | 3.32593 |
| 1981 | 3.34559 |
| 1980 | 3.36715 |
| 1979 | 3.38958 |
| 1978 | 3.41206 |
| 1977 | 3.4339 |
| 1976 | 3.4545 |
| 1975 | 3.47405 |
| 1974 | 3.49269 |
| 1973 | 3.51006 |
| 1972 | 3.5264 |
| 1971 | 3.5421 |
| 1970 | 3.55641 |
| 1969 | 3.57 |
| 1968 | 3.58312 |
| 1967 | 3.59543 |
| 1966 | 3.60703 |
| 1965 | 3.61798 |
| 1964 | 3.62848 |
| 1963 | 3.63835 |
| 1962 | 3.64662 |
| 1961 | 3.65244 |
| 1960 | 3.65529 |