| 年份 | 贝宁  | 
                                                            
|---|---|
| 2023 | - | 
| 2022 | 4.40768 | 
| 2021 | 4.35065 | 
| 2020 | 4.30128 | 
| 2019 | 4.2671 | 
| 2018 | 4.25056 | 
| 2017 | 4.24494 | 
| 2016 | 4.24327 | 
| 2015 | 4.24337 | 
| 2014 | 4.24422 | 
| 2013 | 4.24569 | 
| 2012 | 4.24548 | 
| 2011 | 4.24465 | 
| 2010 | 4.24566 | 
| 2009 | 4.24629 | 
| 2008 | 4.24347 | 
| 2007 | 4.23625 | 
| 2006 | 4.22482 | 
| 2005 | 4.20015 | 
| 2004 | 4.16318 | 
| 2003 | 4.12336 | 
| 2002 | 4.08011 | 
| 2001 | 4.03432 | 
| 2000 | 3.99304 | 
| 1999 | 3.95968 | 
| 1998 | 3.93124 | 
| 1997 | 3.90856 | 
| 1996 | 3.89525 | 
| 1995 | 3.89803 | 
| 1994 | 3.84018 | 
| 1993 | 3.69935 | 
| 1992 | 3.59619 | 
| 1991 | 3.56254 | 
| 1990 | 3.54879 | 
| 1989 | 3.64462 | 
| 1988 | 3.80317 | 
| 1987 | 3.89181 | 
| 1986 | 3.93577 | 
| 1985 | 3.94806 | 
| 1984 | 3.94303 | 
| 1983 | 3.92658 | 
| 1982 | 3.90426 | 
| 1981 | 3.88619 | 
| 1980 | 3.87394 | 
| 1979 | 3.86472 | 
| 1978 | 3.86279 | 
| 1977 | 3.87167 | 
| 1976 | 3.88626 | 
| 1975 | 3.90324 | 
| 1974 | 3.92521 | 
| 1973 | 3.95336 | 
| 1972 | 3.98728 | 
| 1971 | 4.02862 | 
| 1970 | 4.07797 | 
| 1969 | 4.13414 | 
| 1968 | 4.19593 | 
| 1967 | 4.26207 | 
| 1966 | 4.33137 | 
| 1965 | 4.40334 | 
| 1964 | 4.47731 | 
| 1963 | 4.55207 | 
| 1962 | 4.62797 | 
| 1961 | 4.7071 | 
| 1960 | 4.78897 |