| 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 |