| 年份 | 尼日尔 |
|---|---|
| 2023 | - |
| 2022 | 1.66438 |
| 2021 | 1.3537 |
| 2020 | 1.73361 |
| 2019 | 1.91734 |
| 2018 | 1.79381 |
| 2017 | 1.80984 |
| 2016 | 1.59965 |
| 2015 | - |
| 2014 | 1.3386 |
| 2013 | 1.04523 |
| 2012 | 1.62398 |
| 2011 | 0.976042 |
| 2010 | 0.876503 |
| 2009 | 0.735262 |
| 2008 | 0.739446 |
| 2007 | - |
| 2006 | - |
| 2005 | 0.715212 |
| 2004 | 1.09119 |
| 2003 | 0.931764 |
| 2002 | 0.963348 |
| 2001 | 1.32016 |
| 2000 | 1.16461 |
| 1999 | 1.16691 |
| 1998 | 1.06122 |
| 1997 | 0.932595 |
| 1996 | 0.861401 |
| 1995 | 0.970976 |
| 1994 | 1.23237 |
| 1993 | - |
| 1992 | - |
| 1991 | - |
| 1990 | - |
| 1989 | - |
| 1988 | - |
| 1987 | 0.63521 |
| 1986 | 0.769504 |
| 1985 | 0.743836 |
| 1984 | 0.727757 |
| 1983 | 0.685199 |
| 1982 | 0.633484 |
| 1981 | 0.631754 |
| 1980 | 0.671391 |
| 1979 | 0.839125 |
| 1978 | 0.928174 |
| 1977 | 0.936634 |
| 1976 | 0.821774 |
| 1975 | 0.870843 |
| 1974 | - |
| 1973 | - |
| 1972 | - |
| 1971 | - |
| 1970 | - |
| 1969 | - |
| 1968 | - |
| 1967 | - |
| 1966 | - |
| 1965 | - |
| 1964 | - |
| 1963 | - |
| 1962 | - |
| 1961 | - |
| 1960 | - |