| 年份 | 塞拉利昂 |
|---|---|
| 2023 | - |
| 2022 | 25.332 |
| 2021 | 6.69151 |
| 2020 | 10.915 |
| 2019 | 7.70279 |
| 2018 | 14.0106 |
| 2017 | 8.956 |
| 2016 | 5.85171 |
| 2015 | 19.6403 |
| 2014 | 1.79536 |
| 2013 | 6.95915 |
| 2012 | 12.0412 |
| 2011 | 17.2951 |
| 2010 | 17.4339 |
| 2009 | 8.54807 |
| 2008 | 9.21372 |
| 2007 | 6.60202 |
| 2006 | 12.493 |
| 2005 | 16.6158 |
| 2004 | 12.8265 |
| 2003 | 13.1977 |
| 2002 | -3.93417 |
| 2001 | 71.352 |
| 2000 | 3.28114 |
| 1999 | 17.1939 |
| 1998 | 23.7751 |
| 1997 | 2.25277 |
| 1996 | 29.5805 |
| 1995 | 33.598 |
| 1994 | 25.062 |
| 1993 | 26.7363 |
| 1992 | 82.0236 |
| 1991 | 128.762 |
| 1990 | 70.5916 |
| 1989 | 61.4913 |
| 1988 | 64.2882 |
| 1987 | 165.677 |
| 1986 | 78.5038 |
| 1985 | 68.8897 |
| 1984 | 39.7673 |
| 1983 | 19.439 |
| 1982 | 18.5016 |
| 1981 | 8.69831 |
| 1980 | -6.00873 |
| 1979 | 11.5357 |
| 1978 | 23.8501 |
| 1977 | 19.7469 |
| 1976 | 8.28421 |
| 1975 | 8.86874 |
| 1974 | 14.1609 |
| 1973 | 23.2252 |
| 1972 | 5.95028 |
| 1971 | -6.92937 |
| 1970 | -2.14247 |
| 1969 | 14.165 |
| 1968 | 6.66698 |
| 1967 | -5.85071 |
| 1966 | 2.73347 |
| 1965 | 5.19692 |
| 1964 | -8.99122E-6 |
| 1963 | 2.34183E-5 |
| 1962 | 1.00347E-5 |
| 1961 | -2.51913E-5 |
| 1960 | - |