| 年份 | 贝宁 |
|---|---|
| 2023 | - |
| 2022 | 2.48908 |
| 2021 | 2.47424 |
| 2020 | 2.45351 |
| 2019 | 2.42615 |
| 2018 | 2.39576 |
| 2017 | 2.36456 |
| 2016 | 2.33292 |
| 2015 | 2.30384 |
| 2014 | 2.27884 |
| 2013 | 2.25596 |
| 2012 | 2.23548 |
| 2011 | 2.21854 |
| 2010 | 2.20604 |
| 2009 | 2.17846 |
| 2008 | 2.15509 |
| 2007 | 2.16721 |
| 2006 | 2.20047 |
| 2005 | 2.24906 |
| 2004 | 2.33127 |
| 2003 | 2.41555 |
| 2002 | 2.4596 |
| 2001 | 2.4783 |
| 2000 | 2.47994 |
| 1999 | 2.47094 |
| 1998 | 2.45502 |
| 1997 | 2.43661 |
| 1996 | 2.41953 |
| 1995 | 2.40332 |
| 1994 | 2.38662 |
| 1993 | 2.39192 |
| 1992 | 2.41048 |
| 1991 | 2.41813 |
| 1990 | 2.42492 |
| 1989 | 2.43191 |
| 1988 | 2.43927 |
| 1987 | 2.44757 |
| 1986 | 2.46053 |
| 1985 | 2.48056 |
| 1984 | 2.5072 |
| 1983 | 2.5399 |
| 1982 | 2.5783 |
| 1981 | 2.62067 |
| 1980 | 2.66526 |
| 1979 | 2.71108 |
| 1978 | 2.75817 |
| 1977 | 2.80622 |
| 1976 | 2.85368 |
| 1975 | 2.8989 |
| 1974 | 2.9415 |
| 1973 | 2.98079 |
| 1972 | 3.01871 |
| 1971 | 3.05957 |
| 1970 | 3.10618 |
| 1969 | 3.1586 |
| 1968 | 3.21671 |
| 1967 | 3.27897 |
| 1966 | 3.34119 |
| 1965 | 3.4003 |
| 1964 | 3.4556 |
| 1963 | 3.50599 |
| 1962 | 3.55329 |
| 1961 | 3.60511 |
| 1960 | 3.66542 |