| 年份 | 贝宁 |
|---|---|
| 2023 | - |
| 2022 | 0.74679 |
| 2021 | 0.740171 |
| 2020 | 0.735889 |
| 2019 | 0.752829 |
| 2018 | 0.78221 |
| 2017 | 0.796765 |
| 2016 | 0.802263 |
| 2015 | 0.801125 |
| 2014 | 0.796263 |
| 2013 | 0.788914 |
| 2012 | 0.780108 |
| 2011 | 0.772166 |
| 2010 | 0.765646 |
| 2009 | 0.760294 |
| 2008 | 0.757207 |
| 2007 | 0.756604 |
| 2006 | 0.757371 |
| 2005 | 0.759286 |
| 2004 | 0.762518 |
| 2003 | 0.766817 |
| 2002 | 0.772087 |
| 2001 | 0.778609 |
| 2000 | 0.786876 |
| 1999 | 0.796569 |
| 1998 | 0.807407 |
| 1997 | 0.819046 |
| 1996 | 0.830802 |
| 1995 | 0.842591 |
| 1994 | 0.854551 |
| 1993 | 0.87221 |
| 1992 | 0.893043 |
| 1991 | 0.9112 |
| 1990 | 0.930739 |
| 1989 | 0.951471 |
| 1988 | 0.973602 |
| 1987 | 0.997521 |
| 1986 | 1.02285 |
| 1985 | 1.04891 |
| 1984 | 1.0761 |
| 1983 | 1.10413 |
| 1982 | 1.132 |
| 1981 | 1.15928 |
| 1980 | 1.1852 |
| 1979 | 1.20919 |
| 1978 | 1.23057 |
| 1977 | 1.24924 |
| 1976 | 1.26568 |
| 1975 | 1.27989 |
| 1974 | 1.29169 |
| 1973 | 1.29999 |
| 1972 | 1.30614 |
| 1971 | 1.31427 |
| 1970 | 1.32724 |
| 1969 | 1.34546 |
| 1968 | 1.37054 |
| 1967 | 1.40125 |
| 1966 | 1.43144 |
| 1965 | 1.45712 |
| 1964 | 1.4784 |
| 1963 | 1.49479 |
| 1962 | 1.5076 |
| 1961 | 1.52425 |
| 1960 | 1.55003 |