| 年份 | 贝宁 |
|---|---|
| 2023 | - |
| 2022 | - |
| 2021 | 0.215436 |
| 2020 | 0.221464 |
| 2019 | 0.227819 |
| 2018 | 0.234492 |
| 2017 | 0.241446 |
| 2016 | 0.248666 |
| 2015 | 0.246964 |
| 2014 | 0.254361 |
| 2013 | 0.261914 |
| 2012 | 0.259634 |
| 2011 | 0.257033 |
| 2010 | 0.26467 |
| 2009 | 0.272553 |
| 2008 | 0.280695 |
| 2007 | 0.289092 |
| 2006 | 0.297526 |
| 2005 | 0.325667 |
| 2004 | 0.335674 |
| 2003 | 0.345989 |
| 2002 | 0.343121 |
| 2001 | 0.33971 |
| 2000 | 0.340096 |
| 1999 | 0.338804 |
| 1998 | 0.341728 |
| 1997 | 0.328792 |
| 1996 | 0.31432 |
| 1995 | 0.296038 |
| 1994 | 0.286998 |
| 1993 | 0.28916 |
| 1992 | 0.298656 |
| 1991 | 0.306062 |
| 1990 | 0.314605 |
| 1989 | 0.325322 |
| 1988 | 0.333221 |
| 1987 | 0.34124 |
| 1986 | 0.349344 |
| 1985 | 0.357502 |
| 1984 | 0.365706 |
| 1983 | 0.373964 |
| 1982 | 0.382302 |
| 1981 | 0.38817 |
| 1980 | 0.391243 |
| 1979 | 0.393849 |
| 1978 | 0.398688 |
| 1977 | 0.40322 |
| 1976 | 0.404586 |
| 1975 | 0.405481 |
| 1974 | 0.402875 |
| 1973 | 0.402804 |
| 1972 | 0.405524 |
| 1971 | 0.404743 |
| 1970 | 0.396899 |
| 1969 | 0.398492 |
| 1968 | 0.379151 |
| 1967 | 0.376265 |
| 1966 | 0.369355 |
| 1965 | 0.365518 |
| 1964 | 0.364907 |
| 1963 | 0.363901 |
| 1962 | 0.362472 |
| 1961 | 0.360612 |
| 1960 | - |