| 年份 | 塞拉利昂 |
|---|---|
| 2023 | - |
| 2022 | 1.36023 |
| 2021 | 1.45201 |
| 2020 | 1.53283 |
| 2019 | 1.58974 |
| 2018 | 1.64421 |
| 2017 | 1.72449 |
| 2016 | 1.74293 |
| 2015 | 1.73998 |
| 2014 | 1.83059 |
| 2013 | 1.90855 |
| 2012 | 1.97919 |
| 2011 | 2.04969 |
| 2010 | 2.15027 |
| 2009 | 2.10639 |
| 2008 | 1.89747 |
| 2007 | 1.5851 |
| 2006 | 1.58976 |
| 2005 | 2.16411 |
| 2004 | 2.96827 |
| 2003 | 3.63802 |
| 2002 | 5.2854 |
| 2001 | 5.41033 |
| 2000 | 2.02954 |
| 1999 | 0.193294 |
| 1998 | 0.647361 |
| 1997 | 0.952612 |
| 1996 | 0.171927 |
| 1995 | -0.147877 |
| 1994 | 0.0879389 |
| 1993 | -0.491899 |
| 1992 | -2.11907 |
| 1991 | 0.863186 |
| 1990 | 3.57033 |
| 1989 | 2.16058 |
| 1988 | 2.36295 |
| 1987 | 2.3539 |
| 1986 | 1.9796 |
| 1985 | 1.59495 |
| 1984 | 1.57905 |
| 1983 | 1.52921 |
| 1982 | 1.45439 |
| 1981 | 1.43353 |
| 1980 | 1.41939 |
| 1979 | 1.38916 |
| 1978 | 1.37903 |
| 1977 | 1.3103 |
| 1976 | 1.27602 |
| 1975 | 1.06948 |
| 1974 | 0.788668 |
| 1973 | 0.832328 |
| 1972 | 0.848742 |
| 1971 | 0.903711 |
| 1970 | 0.967093 |
| 1969 | 0.995218 |
| 1968 | 1.04073 |
| 1967 | 1.0602 |
| 1966 | 1.06752 |
| 1965 | 1.08403 |
| 1964 | 1.06643 |
| 1963 | 1.0929 |
| 1962 | 1.08245 |
| 1961 | 1.0438 |
| 1960 | - |