| 年份 | 贝宁 |
|---|---|
| 2023 | - |
| 2022 | 8.79452 |
| 2021 | 8.80661 |
| 2020 | 8.8396 |
| 2019 | 8.90879 |
| 2018 | 8.97114 |
| 2017 | 8.99601 |
| 2016 | 9.0131 |
| 2015 | 9.0162 |
| 2014 | 8.97433 |
| 2013 | 8.94232 |
| 2012 | 8.95758 |
| 2011 | 8.96946 |
| 2010 | 8.97543 |
| 2009 | 8.98285 |
| 2008 | 8.98437 |
| 2007 | 8.98191 |
| 2006 | 8.9935 |
| 2005 | 8.96815 |
| 2004 | 8.90289 |
| 2003 | 8.83746 |
| 2002 | 8.75941 |
| 2001 | 8.67802 |
| 2000 | 8.60652 |
| 1999 | 8.56094 |
| 1998 | 8.54614 |
| 1997 | 8.55207 |
| 1996 | 8.57939 |
| 1995 | 8.65268 |
| 1994 | 8.80224 |
| 1993 | 8.7547 |
| 1992 | 8.59337 |
| 1991 | 8.58417 |
| 1990 | 8.58141 |
| 1989 | 8.57955 |
| 1988 | 8.57502 |
| 1987 | 8.56532 |
| 1986 | 8.54246 |
| 1985 | 8.49565 |
| 1984 | 8.42679 |
| 1983 | 8.3467 |
| 1982 | 8.2602 |
| 1981 | 8.16994 |
| 1980 | 8.08687 |
| 1979 | 8.01467 |
| 1978 | 7.94705 |
| 1977 | 7.88713 |
| 1976 | 7.83782 |
| 1975 | 7.80216 |
| 1974 | 7.70982 |
| 1973 | 7.63127 |
| 1972 | 7.67691 |
| 1971 | 7.79417 |
| 1970 | 7.95202 |
| 1969 | 8.20978 |
| 1968 | 8.46979 |
| 1967 | 8.59094 |
| 1966 | 8.62593 |
| 1965 | 8.60292 |
| 1964 | 8.54124 |
| 1963 | 8.45207 |
| 1962 | 8.35031 |
| 1961 | 8.25133 |
| 1960 | 8.15848 |