| 年份 | 塞拉利昂 |
|---|---|
| 2023 | - |
| 2022 | 0.599793 |
| 2021 | 0.609066 |
| 2020 | 0.546605 |
| 2019 | 0.672477 |
| 2018 | 0.751993 |
| 2017 | 1.09382 |
| 2016 | 1.11638 |
| 2015 | 0.923453 |
| 2014 | 0.973262 |
| 2013 | 0.643966 |
| 2012 | 0.782801 |
| 2011 | 0.865813 |
| 2010 | 0.97215 |
| 2009 | 1.07603 |
| 2008 | 0.943706 |
| 2007 | 1.34699 |
| 2006 | 1.4864 |
| 2005 | 1.42681 |
| 2004 | 1.58495 |
| 2003 | 2.05395 |
| 2002 | 2.16462 |
| 2001 | 2.74253 |
| 2000 | 2.51216 |
| 1999 | 1.74034 |
| 1998 | 1.0247 |
| 1997 | 0.764917 |
| 1996 | 1.35295 |
| 1995 | 1.96929 |
| 1994 | 1.99117 |
| 1993 | 2.08012 |
| 1992 | 2.68691 |
| 1991 | 2.03646 |
| 1990 | 1.30665 |
| 1989 | 1.5429 |
| 1988 | 0.854103 |
| 1987 | 0.694642 |
| 1986 | 1.47439 |
| 1985 | 0.733104 |
| 1984 | 0.912255 |
| 1983 | 1.02873 |
| 1982 | 1.09068 |
| 1981 | 1.41619 |
| 1980 | 1.44526 |
| 1979 | 1.10766 |
| 1978 | 0.999882 |
| 1977 | 1.08842 |
| 1976 | 1.09209 |
| 1975 | 1.03021 |
| 1974 | 1.2139 |
| 1973 | 1.04246 |
| 1972 | 0.953064 |
| 1971 | 0.898738 |
| 1970 | 0.934985 |
| 1969 | 0.872658 |
| 1968 | 0.804869 |
| 1967 | 0.796947 |
| 1966 | 0.692631 |
| 1965 | 0.722648 |
| 1964 | 0.780771 |
| 1963 | 0.763132 |
| 1962 | 0.714214 |
| 1961 | 0.726554 |
| 1960 | - |