| 年份 | 塞拉利昂 |
|---|---|
| 2023 | - |
| 2022 | 1.82372 |
| 2021 | 1.79848 |
| 2020 | 1.77508 |
| 2019 | 1.75001 |
| 2018 | 1.72148 |
| 2017 | 1.69465 |
| 2016 | 1.67167 |
| 2015 | 1.65264 |
| 2014 | 1.62971 |
| 2013 | 1.60925 |
| 2012 | 1.61599 |
| 2011 | 1.64241 |
| 2010 | 1.67157 |
| 2009 | 1.71521 |
| 2008 | 1.7656 |
| 2007 | 1.78739 |
| 2006 | 1.78766 |
| 2005 | 1.7881 |
| 2004 | 1.79011 |
| 2003 | 1.79879 |
| 2002 | 1.81517 |
| 2001 | 1.83589 |
| 2000 | 1.85798 |
| 1999 | 1.88175 |
| 1998 | 1.90548 |
| 1997 | 1.92646 |
| 1996 | 1.9461 |
| 1995 | 1.96683 |
| 1994 | 1.98814 |
| 1993 | 2.00734 |
| 1992 | 2.0246 |
| 1991 | 2.04223 |
| 1990 | 2.05992 |
| 1989 | 2.07829 |
| 1988 | 2.09635 |
| 1987 | 2.11348 |
| 1986 | 2.12946 |
| 1985 | 2.14503 |
| 1984 | 2.16006 |
| 1983 | 2.17493 |
| 1982 | 2.18935 |
| 1981 | 2.20249 |
| 1980 | 2.21539 |
| 1979 | 2.22833 |
| 1978 | 2.24093 |
| 1977 | 2.25348 |
| 1976 | 2.26435 |
| 1975 | 2.27409 |
| 1974 | 2.28418 |
| 1973 | 2.29373 |
| 1972 | 2.30242 |
| 1971 | 2.30928 |
| 1970 | 2.31479 |
| 1969 | 2.31951 |
| 1968 | 2.32226 |
| 1967 | 2.32324 |
| 1966 | 2.3228 |
| 1965 | 2.32125 |
| 1964 | 2.31868 |
| 1963 | 2.31506 |
| 1962 | 2.31036 |
| 1961 | 2.30387 |
| 1960 | 2.29496 |