| 年份 | 贝宁 |
|---|---|
| 2023 | - |
| 2022 | 2.89575 |
| 2021 | 2.8912 |
| 2020 | 2.88889 |
| 2019 | 2.8857 |
| 2018 | 2.87985 |
| 2017 | 2.87139 |
| 2016 | 2.85877 |
| 2015 | 2.83825 |
| 2014 | 2.81077 |
| 2013 | 2.7799 |
| 2012 | 2.74675 |
| 2011 | 2.71237 |
| 2010 | 2.68106 |
| 2009 | 2.65486 |
| 2008 | 2.63183 |
| 2007 | 2.61248 |
| 2006 | 2.59798 |
| 2005 | 2.58925 |
| 2004 | 2.53081 |
| 2003 | 2.44306 |
| 2002 | 2.3931 |
| 2001 | 2.36408 |
| 2000 | 2.34784 |
| 1999 | 2.40495 |
| 1998 | 2.50416 |
| 1997 | 2.55704 |
| 1996 | 2.58105 |
| 1995 | 2.5852 |
| 1994 | 2.58005 |
| 1993 | 2.56654 |
| 1992 | 2.54816 |
| 1991 | 2.53503 |
| 1990 | 2.52655 |
| 1989 | 2.52131 |
| 1988 | 2.5228 |
| 1987 | 2.53293 |
| 1986 | 2.54744 |
| 1985 | 2.56406 |
| 1984 | 2.58468 |
| 1983 | 2.60995 |
| 1982 | 2.63949 |
| 1981 | 2.67469 |
| 1980 | 2.71552 |
| 1979 | 2.76049 |
| 1978 | 2.80836 |
| 1977 | 2.8589 |
| 1976 | 2.91196 |
| 1975 | 2.96708 |
| 1974 | 3.02416 |
| 1973 | 3.08281 |
| 1972 | 3.14371 |
| 1971 | 3.20854 |
| 1970 | 3.27769 |
| 1969 | 3.35081 |
| 1968 | 3.42812 |
| 1967 | 3.509 |
| 1966 | 3.59204 |
| 1965 | 3.67618 |
| 1964 | 3.76076 |
| 1963 | 3.84547 |
| 1962 | 3.92828 |
| 1961 | 4.00637 |
| 1960 | 4.07704 |