| 年份 | 尼日尔 |
|---|---|
| 2023 | - |
| 2022 | - |
| 2021 | - |
| 2020 | - |
| 2019 | - |
| 2018 | - |
| 2017 | 27.148 |
| 2016 | 25.787 |
| 2015 | 22.5771 |
| 2014 | 20.4768 |
| 2013 | 18.5324 |
| 2012 | 17.2858 |
| 2011 | 16.1753 |
| 2010 | 14.8534 |
| 2009 | 13.5576 |
| 2008 | 12.8715 |
| 2007 | 12.3654 |
| 2006 | 12.6942 |
| 2005 | 10.9395 |
| 2004 | 9.93025 |
| 2003 | 8.10047 |
| 2002 | 7.44752 |
| 2001 | 7.31929 |
| 2000 | 7.40725 |
| 1999 | 7.60529 |
| 1998 | 7.54973 |
| 1997 | 7.84092 |
| 1996 | 7.81542 |
| 1995 | - |
| 1994 | - |
| 1993 | 7.72727 |
| 1992 | 7.96009 |
| 1991 | 8.33174 |
| 1990 | 7.69635 |
| 1989 | 7.59573 |
| 1988 | 7.01431 |
| 1987 | - |
| 1986 | - |
| 1985 | - |
| 1984 | - |
| 1983 | - |
| 1982 | - |
| 1981 | 5.5027 |
| 1980 | 4.81309 |
| 1979 | 4.15256 |
| 1978 | 3.43822 |
| 1977 | 2.87633 |
| 1976 | 2.38726 |
| 1975 | 2.11527 |
| 1974 | 1.96878 |
| 1973 | 1.68261 |
| 1972 | 1.51077 |
| 1971 | 1.34402 |
| 1970 | - |
| 1969 | - |
| 1968 | - |
| 1967 | - |
| 1966 | - |
| 1965 | - |
| 1964 | - |
| 1963 | - |
| 1962 | - |
| 1961 | - |
| 1960 | - |