| 年份 | 贝宁 |
|---|---|
| 2023 | - |
| 2022 | 5.4534 |
| 2021 | 5.42406 |
| 2020 | 5.39107 |
| 2019 | 5.3484 |
| 2018 | 5.29557 |
| 2017 | 5.23811 |
| 2016 | 5.18143 |
| 2015 | 5.13194 |
| 2014 | 5.09824 |
| 2013 | 5.08383 |
| 2012 | 5.08047 |
| 2011 | 5.07938 |
| 2010 | 5.0796 |
| 2009 | 5.08109 |
| 2008 | 5.08403 |
| 2007 | 5.08714 |
| 2006 | 5.09593 |
| 2005 | 5.10352 |
| 2004 | 5.10604 |
| 2003 | 5.10777 |
| 2002 | 5.10199 |
| 2001 | 5.08636 |
| 2000 | 5.05633 |
| 1999 | 5.01481 |
| 1998 | 4.96888 |
| 1997 | 4.92139 |
| 1996 | 4.87842 |
| 1995 | 4.85658 |
| 1994 | 4.86947 |
| 1993 | 4.81223 |
| 1992 | 4.72592 |
| 1991 | 4.7118 |
| 1990 | 4.70737 |
| 1989 | 4.60948 |
| 1988 | 4.45808 |
| 1987 | 4.37992 |
| 1986 | 4.34195 |
| 1985 | 4.32774 |
| 1984 | 4.44621 |
| 1983 | 4.63887 |
| 1982 | 4.74544 |
| 1981 | 4.79803 |
| 1980 | 4.81136 |
| 1979 | 4.80137 |
| 1978 | 4.77506 |
| 1977 | 4.74049 |
| 1976 | 4.71055 |
| 1975 | 4.68784 |
| 1974 | 4.67039 |
| 1973 | 4.66392 |
| 1972 | 4.67136 |
| 1971 | 4.68517 |
| 1970 | 4.701 |
| 1969 | 4.72211 |
| 1968 | 4.75016 |
| 1967 | 4.78447 |
| 1966 | 4.82738 |
| 1965 | 4.87998 |
| 1964 | 4.94043 |
| 1963 | 5.00636 |
| 1962 | 5.07565 |
| 1961 | 5.14647 |
| 1960 | 5.2166 |