| 年份 | 贝宁 |
|---|---|
| 2023 | - |
| 2022 | 4.13878 |
| 2021 | 1.61873 |
| 2020 | 2.87803 |
| 2019 | -0.397554 |
| 2018 | 0.670448 |
| 2017 | -0.367898 |
| 2016 | 0.683591 |
| 2015 | 0.851504 |
| 2014 | -0.247783 |
| 2013 | 1.3973 |
| 2012 | 7.69891 |
| 2011 | 3.73308 |
| 2010 | 0.880886 |
| 2009 | 2.53969 |
| 2008 | 6.43415 |
| 2007 | 0.390153 |
| 2006 | 2.09432 |
| 2005 | 4.29366 |
| 2004 | 0.769711 |
| 2003 | 3.0617 |
| 2002 | 3.55421 |
| 2001 | 1.97029 |
| 2000 | 4.34106 |
| 1999 | 48.3425 |
| 1998 | 5.2316 |
| 1997 | 3.66751 |
| 1996 | 6.90729 |
| 1995 | 15.0995 |
| 1994 | 35.0301 |
| 1993 | 2.37832 |
| 1992 | 3.02513 |
| 1991 | 0.75662 |
| 1990 | 2.1766 |
| 1989 | 2.22493 |
| 1988 | -0.610507 |
| 1987 | 3.02846 |
| 1986 | -3.60417 |
| 1985 | -4.87698 |
| 1984 | 1.95358 |
| 1983 | 4.74621 |
| 1982 | 16.1483 |
| 1981 | 7.46895 |
| 1980 | 10.1878 |
| 1979 | 13.0047 |
| 1978 | 12.3345 |
| 1977 | 5.17689 |
| 1976 | 14.0354 |
| 1975 | 14.2469 |
| 1974 | 14.9207 |
| 1973 | 4.82274 |
| 1972 | 5.31723 |
| 1971 | 1.57328 |
| 1970 | 5.04705 |
| 1969 | 3.4542 |
| 1968 | 3.27352 |
| 1967 | 0.141072 |
| 1966 | 1.13667 |
| 1965 | 2.05762 |
| 1964 | -0.363672 |
| 1963 | 2.54904 |
| 1962 | 3.78056 |
| 1961 | 1.04144 |
| 1960 | - |