| 年份 | 贝宁 |
|---|---|
| 2023 | - |
| 2022 | - |
| 2021 | 5.32104 |
| 2020 | 5.32104 |
| 2019 | 5.32104 |
| 2018 | 5.32104 |
| 2017 | 5.32104 |
| 2016 | 5.32104 |
| 2015 | 6.20788 |
| 2014 | 6.20788 |
| 2013 | 6.20788 |
| 2012 | 5.32104 |
| 2011 | 5.32104 |
| 2010 | 5.32104 |
| 2009 | 5.32104 |
| 2008 | 4.4342 |
| 2007 | 2.66052 |
| 2006 | 2.57183 |
| 2005 | 2.48315 |
| 2004 | 2.36786 |
| 2003 | 2.36786 |
| 2002 | 2.35012 |
| 2001 | 2.35012 |
| 2000 | 2.35012 |
| 1999 | 2.30578 |
| 1998 | 2.2171 |
| 1997 | 2.12841 |
| 1996 | 1.86236 |
| 1995 | 1.59631 |
| 1994 | 1.33026 |
| 1993 | 1.06421 |
| 1992 | 1.01987 |
| 1991 | 0.975523 |
| 1990 | 0.931181 |
| 1989 | 0.886839 |
| 1988 | 0.886839 |
| 1987 | 0.886839 |
| 1986 | 0.886839 |
| 1985 | 0.886839 |
| 1984 | 0.798155 |
| 1983 | 0.798155 |
| 1982 | 0.798155 |
| 1981 | 0.753813 |
| 1980 | 0.753813 |
| 1979 | 0.753813 |
| 1978 | 0.753813 |
| 1977 | 0.753813 |
| 1976 | 0.753813 |
| 1975 | 0.753813 |
| 1974 | 0.753813 |
| 1973 | 0.753813 |
| 1972 | 0.753813 |
| 1971 | 0.753813 |
| 1970 | 0.753813 |
| 1969 | 0.753813 |
| 1968 | 0.709471 |
| 1967 | 0.709471 |
| 1966 | 0.709471 |
| 1965 | 0.709471 |
| 1964 | 0.709471 |
| 1963 | 0.709471 |
| 1962 | 0.709471 |
| 1961 | 0.709471 |
| 1960 | - |