| 年份 | 贝宁 |
|---|---|
| 2023 | - |
| 2022 | 0.468585 |
| 2021 | 0.477417 |
| 2020 | 0.480999 |
| 2019 | 0.478997 |
| 2018 | 0.473787 |
| 2017 | 0.468095 |
| 2016 | 0.463062 |
| 2015 | 0.458768 |
| 2014 | 0.454956 |
| 2013 | 0.452249 |
| 2012 | 0.450908 |
| 2011 | 0.450385 |
| 2010 | 0.450325 |
| 2009 | 0.451077 |
| 2008 | 0.452755 |
| 2007 | 0.454999 |
| 2006 | 0.458289 |
| 2005 | 0.462985 |
| 2004 | 0.46868 |
| 2003 | 0.475005 |
| 2002 | 0.481714 |
| 2001 | 0.488472 |
| 2000 | 0.49547 |
| 1999 | 0.502601 |
| 1998 | 0.509761 |
| 1997 | 0.516969 |
| 1996 | 0.524261 |
| 1995 | 0.53207 |
| 1994 | 0.540769 |
| 1993 | 0.552616 |
| 1992 | 0.566213 |
| 1991 | 0.578486 |
| 1990 | 0.590845 |
| 1989 | 0.603311 |
| 1988 | 0.616106 |
| 1987 | 0.629388 |
| 1986 | 0.642842 |
| 1985 | 0.655924 |
| 1984 | 0.668927 |
| 1983 | 0.681262 |
| 1982 | 0.692193 |
| 1981 | 0.701916 |
| 1980 | 0.710117 |
| 1979 | 0.716191 |
| 1978 | 0.719341 |
| 1977 | 0.72069 |
| 1976 | 0.722838 |
| 1975 | 0.727725 |
| 1974 | 0.736035 |
| 1973 | 0.748271 |
| 1972 | 0.763614 |
| 1971 | 0.778832 |
| 1970 | 0.791881 |
| 1969 | 0.802594 |
| 1968 | 0.81066 |
| 1967 | 0.816874 |
| 1966 | 0.825237 |
| 1965 | 0.838892 |
| 1964 | 0.857844 |
| 1963 | 0.883225 |
| 1962 | 0.915126 |
| 1961 | 0.950191 |
| 1960 | 0.985994 |