| 年份 | 贝宁 |
|---|---|
| 2023 | - |
| 2022 | - |
| 2021 | 9.434 |
| 2020 | 9.364 |
| 2019 | 9.248 |
| 2018 | 9.428 |
| 2017 | 9.592 |
| 2016 | 9.761 |
| 2015 | 9.857 |
| 2014 | 9.996 |
| 2013 | 10.085 |
| 2012 | 10.224 |
| 2011 | 10.372 |
| 2010 | 10.461 |
| 2009 | 10.7 |
| 2008 | 10.798 |
| 2007 | 10.961 |
| 2006 | 11.128 |
| 2005 | 11.337 |
| 2004 | 11.546 |
| 2003 | 11.649 |
| 2002 | 11.77 |
| 2001 | 11.825 |
| 2000 | 11.964 |
| 1999 | 12.103 |
| 1998 | 12.36 |
| 1997 | 12.596 |
| 1996 | 12.927 |
| 1995 | 13.192 |
| 1994 | 13.473 |
| 1993 | 13.748 |
| 1992 | 14.088 |
| 1991 | 14.461 |
| 1990 | 14.75 |
| 1989 | 15.2 |
| 1988 | 15.543 |
| 1987 | 16.01 |
| 1986 | 16.451 |
| 1985 | 16.963 |
| 1984 | 17.44 |
| 1983 | 17.79 |
| 1982 | 18.219 |
| 1981 | 18.61 |
| 1980 | 18.929 |
| 1979 | 19.298 |
| 1978 | 19.63 |
| 1977 | 20.28 |
| 1976 | 20.869 |
| 1975 | 21.569 |
| 1974 | 22.128 |
| 1973 | 22.631 |
| 1972 | 23.096 |
| 1971 | 23.668 |
| 1970 | 24.108 |
| 1969 | 24.51 |
| 1968 | 24.908 |
| 1967 | 25.435 |
| 1966 | 25.915 |
| 1965 | 26.432 |
| 1964 | 26.896 |
| 1963 | 27.345 |
| 1962 | 27.765 |
| 1961 | 28.142 |
| 1960 | 28.468 |