| 年份 | 贝宁 |
|---|---|
| 2023 | - |
| 2022 | 3.54214 |
| 2021 | 3.53455 |
| 2020 | 3.52928 |
| 2019 | 3.52528 |
| 2018 | 3.52281 |
| 2017 | 3.52055 |
| 2016 | 3.51926 |
| 2015 | 3.51991 |
| 2014 | 3.51995 |
| 2013 | 3.51643 |
| 2012 | 3.50787 |
| 2011 | 3.49289 |
| 2010 | 3.46799 |
| 2009 | 3.43492 |
| 2008 | 3.39852 |
| 2007 | 3.36063 |
| 2006 | 3.32313 |
| 2005 | 3.28933 |
| 2004 | 3.26073 |
| 2003 | 3.23612 |
| 2002 | 3.21472 |
| 2001 | 3.1974 |
| 2000 | 3.18657 |
| 1999 | 3.11456 |
| 1998 | 3.00705 |
| 1997 | 2.94798 |
| 1996 | 2.91764 |
| 1995 | 2.90775 |
| 1994 | 2.99374 |
| 1993 | 3.11199 |
| 1992 | 3.168 |
| 1991 | 3.20238 |
| 1990 | 3.21127 |
| 1989 | 3.2058 |
| 1988 | 3.1917 |
| 1987 | 3.1737 |
| 1986 | 3.15917 |
| 1985 | 3.15004 |
| 1984 | 3.1451 |
| 1983 | 3.14794 |
| 1982 | 3.16061 |
| 1981 | 3.17853 |
| 1980 | 3.19835 |
| 1979 | 3.22112 |
| 1978 | 3.24749 |
| 1977 | 3.27807 |
| 1976 | 3.31503 |
| 1975 | 3.35896 |
| 1974 | 3.40908 |
| 1973 | 3.46426 |
| 1972 | 3.52348 |
| 1971 | 3.58566 |
| 1970 | 3.6499 |
| 1969 | 3.71607 |
| 1968 | 3.78389 |
| 1967 | 3.85406 |
| 1966 | 3.92867 |
| 1965 | 4.00851 |
| 1964 | 4.09279 |
| 1963 | 4.18091 |
| 1962 | 4.27173 |
| 1961 | 4.36316 |
| 1960 | 4.45274 |