| 年份 | 贝宁  | 
                                                            
|---|---|
| 2023 | - | 
| 2022 | 5.62262 | 
| 2021 | 5.66077 | 
| 2020 | 5.69916 | 
| 2019 | 5.71521 | 
| 2018 | 5.71851 | 
| 2017 | 5.72623 | 
| 2016 | 5.73791 | 
| 2015 | 5.75231 | 
| 2014 | 5.81717 | 
| 2013 | 5.9044 | 
| 2012 | 5.94896 | 
| 2011 | 5.97365 | 
| 2010 | 5.98647 | 
| 2009 | 5.99938 | 
| 2008 | 6.01212 | 
| 2007 | 6.02233 | 
| 2006 | 6.03546 | 
| 2005 | 6.06767 | 
| 2004 | 6.11596 | 
| 2003 | 6.16705 | 
| 2002 | 6.22947 | 
| 2001 | 6.29734 | 
| 2000 | 6.36749 | 
| 1999 | 6.44121 | 
| 1998 | 6.51887 | 
| 1997 | 6.59966 | 
| 1996 | 6.67795 | 
| 1995 | 6.73873 | 
| 1994 | 6.76525 | 
| 1993 | 6.9083 | 
| 1992 | 7.11372 | 
| 1991 | 7.22519 | 
| 1990 | 7.33809 | 
| 1989 | 7.45292 | 
| 1988 | 7.56872 | 
| 1987 | 7.68575 | 
| 1986 | 7.80639 | 
| 1985 | 7.92947 | 
| 1984 | 8.05526 | 
| 1983 | 8.18173 | 
| 1982 | 8.30807 | 
| 1981 | 8.43627 | 
| 1980 | 8.56475 | 
| 1979 | 8.69111 | 
| 1978 | 8.81295 | 
| 1977 | 8.93197 | 
| 1976 | 9.04941 | 
| 1975 | 9.1626 | 
| 1974 | 9.27151 | 
| 1973 | 9.37405 | 
| 1972 | 9.4693 | 
| 1971 | 9.56156 | 
| 1970 | 9.65497 | 
| 1969 | 9.74851 | 
| 1968 | 9.84062 | 
| 1967 | 9.9351 | 
| 1966 | 10.0329 | 
| 1965 | 10.1348 | 
| 1964 | 10.2143 | 
| 1963 | 10.291 | 
| 1962 | 10.4077 | 
| 1961 | 10.5559 | 
| 1960 | 10.7324 |