| 年份 | 贝宁 |
|---|---|
| 2023 | - |
| 2022 | 3.06458 |
| 2021 | 3.07638 |
| 2020 | 3.08886 |
| 2019 | 3.09036 |
| 2018 | 3.08584 |
| 2017 | 3.08511 |
| 2016 | 3.08769 |
| 2015 | 3.09178 |
| 2014 | 3.1208 |
| 2013 | 3.16044 |
| 2012 | 3.17751 |
| 2011 | 3.18298 |
| 2010 | 3.18077 |
| 2009 | 3.17571 |
| 2008 | 3.17109 |
| 2007 | 3.1688 |
| 2006 | 3.17091 |
| 2005 | 3.17931 |
| 2004 | 3.1932 |
| 2003 | 3.211 |
| 2002 | 3.23315 |
| 2001 | 3.25704 |
| 2000 | 3.28178 |
| 1999 | 3.30868 |
| 1998 | 3.33832 |
| 1997 | 3.37059 |
| 1996 | 3.40551 |
| 1995 | 3.44238 |
| 1994 | 3.48122 |
| 1993 | 3.54101 |
| 1992 | 3.609 |
| 1991 | 3.6632 |
| 1990 | 3.71882 |
| 1989 | 3.77563 |
| 1988 | 3.83397 |
| 1987 | 3.89411 |
| 1986 | 3.95641 |
| 1985 | 4.02066 |
| 1984 | 4.08702 |
| 1983 | 4.15413 |
| 1982 | 4.22189 |
| 1981 | 4.2914 |
| 1980 | 4.36087 |
| 1979 | 4.42842 |
| 1978 | 4.49287 |
| 1977 | 4.55679 |
| 1976 | 4.62216 |
| 1975 | 4.68871 |
| 1974 | 4.75692 |
| 1973 | 4.82508 |
| 1972 | 4.89287 |
| 1971 | 4.96224 |
| 1970 | 5.03467 |
| 1969 | 5.10944 |
| 1968 | 5.18584 |
| 1967 | 5.2656 |
| 1966 | 5.3494 |
| 1965 | 5.43719 |
| 1964 | 5.53003 |
| 1963 | 5.62822 |
| 1962 | 5.73259 |
| 1961 | 5.84529 |
| 1960 | 5.96626 |