| 年份 | 尼日尔 |
|---|---|
| 2023 | - |
| 2022 | - |
| 2021 | 15.9748 |
| 2020 | - |
| 2019 | 17.396 |
| 2018 | 18.6551 |
| 2017 | 17.4376 |
| 2016 | 16.2383 |
| 2015 | 14.9057 |
| 2014 | 11.895 |
| 2013 | 11.6924 |
| 2012 | 11.2096 |
| 2011 | 9.79497 |
| 2010 | 8.47698 |
| 2009 | 8.63207 |
| 2008 | 8.51155 |
| 2007 | 7.29808 |
| 2006 | 7.61086 |
| 2005 | 6.80959 |
| 2004 | 6.47112 |
| 2003 | 4.58517 |
| 2002 | 4.17455 |
| 2001 | 4.57338 |
| 2000 | 4.50738 |
| 1999 | - |
| 1998 | - |
| 1997 | 5.97598 |
| 1996 | - |
| 1995 | - |
| 1994 | - |
| 1993 | - |
| 1992 | 4.63916 |
| 1991 | 4.66614 |
| 1990 | 4.51189 |
| 1989 | 4.05024 |
| 1988 | - |
| 1987 | - |
| 1986 | 5.38531 |
| 1985 | - |
| 1984 | - |
| 1983 | - |
| 1982 | - |
| 1981 | 3.73328 |
| 1980 | - |
| 1979 | 2.3733 |
| 1978 | 1.925 |
| 1977 | 1.86629 |
| 1976 | 1.36026 |
| 1975 | 1.34337 |
| 1974 | 1.25429 |
| 1973 | 1.06128 |
| 1972 | 0.78253 |
| 1971 | 0.5723 |
| 1970 | - |
| 1969 | - |
| 1968 | - |
| 1967 | - |
| 1966 | - |
| 1965 | - |
| 1964 | - |
| 1963 | - |
| 1962 | - |
| 1961 | - |
| 1960 | - |