| 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 |