| 年份 | 塞拉利昂 |
|---|---|
| 2023 | - |
| 2022 | 13.7973 |
| 2021 | 13.9711 |
| 2020 | 14.1356 |
| 2019 | 14.3126 |
| 2018 | 14.5168 |
| 2017 | 14.7529 |
| 2016 | 15.0146 |
| 2015 | 15.2832 |
| 2014 | 15.5405 |
| 2013 | 15.7705 |
| 2012 | 15.9586 |
| 2011 | 16.1146 |
| 2010 | 16.2534 |
| 2009 | 16.3738 |
| 2008 | 16.5067 |
| 2007 | 16.673 |
| 2006 | 16.8435 |
| 2005 | 17.0021 |
| 2004 | 17.15 |
| 2003 | 17.2534 |
| 2002 | 17.296 |
| 2001 | 17.3091 |
| 2000 | 17.3076 |
| 1999 | 17.2936 |
| 1998 | 17.2822 |
| 1997 | 17.2663 |
| 1996 | 17.2334 |
| 1995 | 17.1992 |
| 1994 | 17.1644 |
| 1993 | 17.1242 |
| 1992 | 17.0997 |
| 1991 | 17.0934 |
| 1990 | 17.0913 |
| 1989 | 17.0867 |
| 1988 | 17.0697 |
| 1987 | 17.0319 |
| 1986 | 16.9842 |
| 1985 | 16.9381 |
| 1984 | 16.8968 |
| 1983 | 16.8665 |
| 1982 | 16.8454 |
| 1981 | 16.8293 |
| 1980 | 16.8203 |
| 1979 | 16.8124 |
| 1978 | 16.7889 |
| 1977 | 16.7543 |
| 1976 | 16.7232 |
| 1975 | 16.6883 |
| 1974 | 16.6486 |
| 1973 | 16.6193 |
| 1972 | 16.6047 |
| 1971 | 16.5899 |
| 1970 | 16.5704 |
| 1969 | 16.5496 |
| 1968 | 16.5215 |
| 1967 | 16.4731 |
| 1966 | 16.4107 |
| 1965 | 16.3386 |
| 1964 | 16.2438 |
| 1963 | 16.1333 |
| 1962 | 16.022 |
| 1961 | 15.9089 |
| 1960 | 15.7926 |