| 年份 | 贝宁 |
|---|---|
| 2023 | - |
| 2022 | 4.40768 |
| 2021 | 4.35065 |
| 2020 | 4.30128 |
| 2019 | 4.2671 |
| 2018 | 4.25056 |
| 2017 | 4.24494 |
| 2016 | 4.24327 |
| 2015 | 4.24337 |
| 2014 | 4.24422 |
| 2013 | 4.24569 |
| 2012 | 4.24548 |
| 2011 | 4.24465 |
| 2010 | 4.24566 |
| 2009 | 4.24629 |
| 2008 | 4.24347 |
| 2007 | 4.23625 |
| 2006 | 4.22482 |
| 2005 | 4.20015 |
| 2004 | 4.16318 |
| 2003 | 4.12336 |
| 2002 | 4.08011 |
| 2001 | 4.03432 |
| 2000 | 3.99304 |
| 1999 | 3.95968 |
| 1998 | 3.93124 |
| 1997 | 3.90856 |
| 1996 | 3.89525 |
| 1995 | 3.89803 |
| 1994 | 3.84018 |
| 1993 | 3.69935 |
| 1992 | 3.59619 |
| 1991 | 3.56254 |
| 1990 | 3.54879 |
| 1989 | 3.64462 |
| 1988 | 3.80317 |
| 1987 | 3.89181 |
| 1986 | 3.93577 |
| 1985 | 3.94806 |
| 1984 | 3.94303 |
| 1983 | 3.92658 |
| 1982 | 3.90426 |
| 1981 | 3.88619 |
| 1980 | 3.87394 |
| 1979 | 3.86472 |
| 1978 | 3.86279 |
| 1977 | 3.87167 |
| 1976 | 3.88626 |
| 1975 | 3.90324 |
| 1974 | 3.92521 |
| 1973 | 3.95336 |
| 1972 | 3.98728 |
| 1971 | 4.02862 |
| 1970 | 4.07797 |
| 1969 | 4.13414 |
| 1968 | 4.19593 |
| 1967 | 4.26207 |
| 1966 | 4.33137 |
| 1965 | 4.40334 |
| 1964 | 4.47731 |
| 1963 | 4.55207 |
| 1962 | 4.62797 |
| 1961 | 4.7071 |
| 1960 | 4.78897 |