| 年份 | 贝宁 |
|---|---|
| 2023 | - |
| 2022 | - |
| 2021 | 40.706 |
| 2020 | 40.2121 |
| 2019 | 55.4637 |
| 2018 | 36.6428 |
| 2017 | 0.0163964 |
| 2016 | 9.94932 |
| 2015 | 0.133233 |
| 2014 | 8.08655 |
| 2013 | 5.00228 |
| 2012 | 10.2904 |
| 2011 | 4.44 |
| 2010 | 9.134 |
| 2009 | 6.544 |
| 2008 | 0.3204 |
| 2007 | 0.2456 |
| 2006 | 0.0132 |
| 2005 | 0.461944 |
| 2004 | 0.054717 |
| 2003 | 0.802264 |
| 2002 | 16.3667 |
| 2001 | 12.6939 |
| 2000 | 14.7899 |
| 1999 | 24.6522 |
| 1998 | 16.7587 |
| 1997 | 18.5562 |
| 1996 | 15.7338 |
| 1995 | 20.1117 |
| 1994 | 10.0324 |
| 1993 | 10.4473 |
| 1992 | 9.40184 |
| 1991 | 7.29444 |
| 1990 | 6.813 |
| 1989 | 2.03704 |
| 1988 | 4.29441 |
| 1987 | 5.91813 |
| 1986 | 6.8044 |
| 1985 | 7.27468 |
| 1984 | 4.68854 |
| 1983 | 3.46154 |
| 1982 | 2 |
| 1981 | 1.80784 |
| 1980 | 0.574667 |
| 1979 | 0.904762 |
| 1978 | 1.32414 |
| 1977 | 0.769231 |
| 1976 | 1.42857 |
| 1975 | 1.76204 |
| 1974 | 3.44436 |
| 1973 | 3.36615 |
| 1972 | 4.64531 |
| 1971 | 4.24 |
| 1970 | 4.75 |
| 1969 | 3.84746 |
| 1968 | 2.71455 |
| 1967 | 2.33178 |
| 1966 | 0.728155 |
| 1965 | 1.1 |
| 1964 | 0.826531 |
| 1963 | 0.442708 |
| 1962 | 0.635106 |
| 1961 | 0.642391 |
| 1960 | - |