| 年份 | 贝宁 |
|---|---|
| 2023 | - |
| 2022 | 2.31287 |
| 2021 | 2.30218 |
| 2020 | 2.28549 |
| 2019 | 2.26171 |
| 2018 | 2.23453 |
| 2017 | 2.20677 |
| 2016 | 2.1788 |
| 2015 | 2.15342 |
| 2014 | 2.13189 |
| 2013 | 2.11231 |
| 2012 | 2.09487 |
| 2011 | 2.08053 |
| 2010 | 2.07048 |
| 2009 | 2.02144 |
| 2008 | 1.94956 |
| 2007 | 1.90802 |
| 2006 | 1.88381 |
| 2005 | 1.87022 |
| 2004 | 1.91538 |
| 2003 | 1.99392 |
| 2002 | 2.03488 |
| 2001 | 2.05198 |
| 2000 | 2.05263 |
| 1999 | 2.04459 |
| 1998 | 2.03119 |
| 1997 | 2.01509 |
| 1996 | 2.00105 |
| 1995 | 1.99016 |
| 1994 | 1.98205 |
| 1993 | 1.98297 |
| 1992 | 1.99183 |
| 1991 | 2.00189 |
| 1990 | 2.01388 |
| 1989 | 2.02882 |
| 1988 | 2.04769 |
| 1987 | 2.07045 |
| 1986 | 2.09786 |
| 1985 | 2.13037 |
| 1984 | 2.16765 |
| 1983 | 2.20882 |
| 1982 | 2.25297 |
| 1981 | 2.29956 |
| 1980 | 2.34788 |
| 1979 | 2.39707 |
| 1978 | 2.44619 |
| 1977 | 2.49637 |
| 1976 | 2.54965 |
| 1975 | 2.60665 |
| 1974 | 2.66723 |
| 1973 | 2.73118 |
| 1972 | 2.79841 |
| 1971 | 2.86786 |
| 1970 | 2.93811 |
| 1969 | 3.00899 |
| 1968 | 3.08096 |
| 1967 | 3.15265 |
| 1966 | 3.222 |
| 1965 | 3.28759 |
| 1964 | 3.34874 |
| 1963 | 3.40514 |
| 1962 | 3.45523 |
| 1961 | 3.49752 |
| 1960 | 3.53017 |