| 年份 | 塞拉利昂 |
|---|---|
| 2023 | - |
| 2022 | - |
| 2021 | 0.212781 |
| 2020 | 0.00418523 |
| 2019 | 0.017579 |
| 2018 | 0.862158 |
| 2017 | 3.66586 |
| 2016 | 2.79625 |
| 2015 | 0.757072 |
| 2014 | 0.279602 |
| 2013 | 0.185587 |
| 2012 | 1.0083 |
| 2011 | 1.23521 |
| 2010 | 0.788592 |
| 2009 | 0.500637 |
| 2008 | 0.591933 |
| 2007 | 1.24159 |
| 2006 | 1.02928 |
| 2005 | 0.00626476 |
| 2004 | 0.00235106 |
| 2003 | - |
| 2002 | - |
| 2001 | - |
| 2000 | - |
| 1999 | - |
| 1998 | 0.00388527 |
| 1997 | 0.116605 |
| 1996 | 0.0421853 |
| 1995 | - |
| 1994 | 1.67626 |
| 1993 | 1.98966 |
| 1992 | 4.47704 |
| 1991 | 3.56608 |
| 1990 | 4.76319 |
| 1989 | 3.72382 |
| 1988 | 2.24493 |
| 1987 | 3.5941 |
| 1986 | 5.90784 |
| 1985 | 3.85475 |
| 1984 | 3.10588 |
| 1983 | 2.69346 |
| 1982 | 1.56473 |
| 1981 | 1.40941 |
| 1980 | 1.4771 |
| 1979 | 1.2697 |
| 1978 | 1.66555 |
| 1977 | 2.43356 |
| 1976 | 2.0274 |
| 1975 | 2.76108 |
| 1974 | 3.03701 |
| 1973 | 1.69741 |
| 1972 | 2.70103 |
| 1971 | 3.02761 |
| 1970 | 2.42858 |
| 1969 | - |
| 1968 | - |
| 1967 | - |
| 1966 | - |
| 1965 | - |
| 1964 | - |
| 1963 | - |
| 1962 | - |
| 1961 | - |
| 1960 | - |