| 年份 | 塞拉利昂 |
|---|---|
| 2023 | - |
| 2022 | 0.272912 |
| 2021 | 0.277398 |
| 2020 | 0.282986 |
| 2019 | 0.285241 |
| 2018 | 0.283545 |
| 2017 | 0.281797 |
| 2016 | 0.280436 |
| 2015 | 0.279519 |
| 2014 | 0.278928 |
| 2013 | 0.278568 |
| 2012 | 0.278494 |
| 2011 | 0.278892 |
| 2010 | 0.279852 |
| 2009 | 0.281245 |
| 2008 | 0.283199 |
| 2007 | 0.285658 |
| 2006 | 0.288162 |
| 2005 | 0.290707 |
| 2004 | 0.293477 |
| 2003 | 0.296623 |
| 2002 | 0.300125 |
| 2001 | 0.303733 |
| 2000 | 0.307661 |
| 1999 | 0.312666 |
| 1998 | 0.318356 |
| 1997 | 0.323627 |
| 1996 | 0.328306 |
| 1995 | 0.333115 |
| 1994 | 0.33809 |
| 1993 | 0.34246 |
| 1992 | 0.346262 |
| 1991 | 0.349914 |
| 1990 | 0.352916 |
| 1989 | 0.355339 |
| 1988 | 0.35744 |
| 1987 | 0.359109 |
| 1986 | 0.360486 |
| 1985 | 0.361811 |
| 1984 | 0.362806 |
| 1983 | 0.36348 |
| 1982 | 0.363848 |
| 1981 | 0.363689 |
| 1980 | 0.363311 |
| 1979 | 0.36258 |
| 1978 | 0.361424 |
| 1977 | 0.359841 |
| 1976 | 0.357577 |
| 1975 | 0.354878 |
| 1974 | 0.351818 |
| 1973 | 0.348293 |
| 1972 | 0.34459 |
| 1971 | 0.340412 |
| 1970 | 0.335865 |
| 1969 | 0.331241 |
| 1968 | 0.325932 |
| 1967 | 0.319796 |
| 1966 | 0.312955 |
| 1965 | 0.305719 |
| 1964 | 0.297867 |
| 1963 | 0.288963 |
| 1962 | 0.279164 |
| 1961 | 0.268634 |
| 1960 | 0.25753 |