| 年份 | 贝宁 |
|---|---|
| 2023 | - |
| 2022 | 1.88958 |
| 2021 | 1.86448 |
| 2020 | 1.84168 |
| 2019 | 1.8205 |
| 2018 | 1.8005 |
| 2017 | 1.78353 |
| 2016 | 1.76986 |
| 2015 | 1.75997 |
| 2014 | 1.73823 |
| 2013 | 1.71932 |
| 2012 | 1.72768 |
| 2011 | 1.75311 |
| 2010 | 1.78927 |
| 2009 | 1.85162 |
| 2008 | 1.91722 |
| 2007 | 1.95131 |
| 2006 | 1.9654 |
| 2005 | 1.96881 |
| 2004 | 1.96532 |
| 2003 | 1.95415 |
| 2002 | 1.94046 |
| 2001 | 1.92776 |
| 2000 | 1.91751 |
| 1999 | 1.91033 |
| 1998 | 1.90857 |
| 1997 | 1.91222 |
| 1996 | 1.91637 |
| 1995 | 1.91651 |
| 1994 | 1.91201 |
| 1993 | 1.92356 |
| 1992 | 1.94225 |
| 1991 | 1.95118 |
| 1990 | 1.9657 |
| 1989 | 1.98527 |
| 1988 | 2.00981 |
| 1987 | 2.03888 |
| 1986 | 2.07091 |
| 1985 | 2.10523 |
| 1984 | 2.14169 |
| 1983 | 2.18049 |
| 1982 | 2.22095 |
| 1981 | 2.26126 |
| 1980 | 2.2993 |
| 1979 | 2.33407 |
| 1978 | 2.36481 |
| 1977 | 2.39396 |
| 1976 | 2.42598 |
| 1975 | 2.46324 |
| 1974 | 2.5059 |
| 1973 | 2.55366 |
| 1972 | 2.60537 |
| 1971 | 2.65741 |
| 1970 | 2.70713 |
| 1969 | 2.75428 |
| 1968 | 2.79781 |
| 1967 | 2.83943 |
| 1966 | 2.88595 |
| 1965 | 2.9413 |
| 1964 | 3.00469 |
| 1963 | 3.0767 |
| 1962 | 3.1534 |
| 1961 | 3.22226 |
| 1960 | 3.27442 |