| 年份 | 贝宁 |
|---|---|
| 2023 | - |
| 2022 | 0.308538 |
| 2021 | 0.313386 |
| 2020 | 0.318144 |
| 2019 | 0.318882 |
| 2018 | 0.317002 |
| 2017 | 0.316213 |
| 2016 | 0.316116 |
| 2015 | 0.316383 |
| 2014 | 0.31703 |
| 2013 | 0.318096 |
| 2012 | 0.319422 |
| 2011 | 0.321142 |
| 2010 | 0.323521 |
| 2009 | 0.326562 |
| 2008 | 0.330105 |
| 2007 | 0.333899 |
| 2006 | 0.33889 |
| 2005 | 0.343749 |
| 2004 | 0.3479 |
| 2003 | 0.352543 |
| 2002 | 0.357073 |
| 2001 | 0.361402 |
| 2000 | 0.365717 |
| 1999 | 0.369906 |
| 1998 | 0.37391 |
| 1997 | 0.377533 |
| 1996 | 0.381202 |
| 1995 | 0.387732 |
| 1994 | 0.401161 |
| 1993 | 0.405239 |
| 1992 | 0.402184 |
| 1991 | 0.406658 |
| 1990 | 0.410618 |
| 1989 | 0.413981 |
| 1988 | 0.416755 |
| 1987 | 0.419303 |
| 1986 | 0.422003 |
| 1985 | 0.42453 |
| 1984 | 0.427142 |
| 1983 | 0.429417 |
| 1982 | 0.430969 |
| 1981 | 0.432685 |
| 1980 | 0.435144 |
| 1979 | 0.438477 |
| 1978 | 0.442453 |
| 1977 | 0.447196 |
| 1976 | 0.452099 |
| 1975 | 0.456983 |
| 1974 | 0.46211 |
| 1973 | 0.466869 |
| 1972 | 0.471695 |
| 1971 | 0.477972 |
| 1970 | 0.486647 |
| 1969 | 0.497768 |
| 1968 | 0.512131 |
| 1967 | 0.530194 |
| 1966 | 0.550679 |
| 1965 | 0.572796 |
| 1964 | 0.596739 |
| 1963 | 0.622962 |
| 1962 | 0.651346 |
| 1961 | 0.68238 |
| 1960 | 0.716612 |