| 年份 | 贝宁 |
|---|---|
| 2023 | - |
| 2022 | 0.645502 |
| 2021 | 0.653974 |
| 2020 | 0.656943 |
| 2019 | 0.654194 |
| 2018 | 0.648288 |
| 2017 | 0.642173 |
| 2016 | 0.637012 |
| 2015 | 0.632969 |
| 2014 | 0.630023 |
| 2013 | 0.628894 |
| 2012 | 0.629651 |
| 2011 | 0.631211 |
| 2010 | 0.632465 |
| 2009 | 0.633977 |
| 2008 | 0.635683 |
| 2007 | 0.637533 |
| 2006 | 0.640434 |
| 2005 | 0.645934 |
| 2004 | 0.65379 |
| 2003 | 0.662562 |
| 2002 | 0.672522 |
| 2001 | 0.682809 |
| 2000 | 0.692903 |
| 1999 | 0.703156 |
| 1998 | 0.713887 |
| 1997 | 0.724948 |
| 1996 | 0.735514 |
| 1995 | 0.743913 |
| 1994 | 0.748811 |
| 1993 | 0.759361 |
| 1992 | 0.771752 |
| 1991 | 0.777897 |
| 1990 | 0.785051 |
| 1989 | 0.793432 |
| 1988 | 0.803301 |
| 1987 | 0.814118 |
| 1986 | 0.82483 |
| 1985 | 0.834929 |
| 1984 | 0.844066 |
| 1983 | 0.851852 |
| 1982 | 0.859047 |
| 1981 | 0.867624 |
| 1980 | 0.878166 |
| 1979 | 0.890178 |
| 1978 | 0.904172 |
| 1977 | 0.920403 |
| 1976 | 0.936108 |
| 1975 | 0.948782 |
| 1974 | 0.958701 |
| 1973 | 0.964791 |
| 1972 | 0.967218 |
| 1971 | 0.969516 |
| 1970 | 0.974385 |
| 1969 | 0.981475 |
| 1968 | 0.989958 |
| 1967 | 1.00078 |
| 1966 | 1.01339 |
| 1965 | 1.02653 |
| 1964 | 1.04058 |
| 1963 | 1.05569 |
| 1962 | 1.07249 |
| 1961 | 1.09308 |
| 1960 | 1.11891 |