| 年份 | 尼日尔 |
|---|---|
| 2023 | - |
| 2022 | - |
| 2021 | - |
| 2020 | - |
| 2019 | - |
| 2018 | - |
| 2017 | 20.3016 |
| 2016 | 19.4114 |
| 2015 | 16.598 |
| 2014 | 14.9604 |
| 2013 | 13.0607 |
| 2012 | 11.9929 |
| 2011 | 10.8078 |
| 2010 | 10.4387 |
| 2009 | 8.54756 |
| 2008 | 8.1748 |
| 2007 | 7.96404 |
| 2006 | 8.36979 |
| 2005 | 7.30688 |
| 2004 | 6.48197 |
| 2003 | 5.37646 |
| 2002 | 4.85143 |
| 2001 | 4.85572 |
| 2000 | 4.88178 |
| 1999 | 4.86573 |
| 1998 | 4.56 |
| 1997 | 4.48404 |
| 1996 | 4.24898 |
| 1995 | - |
| 1994 | - |
| 1993 | 3.89748 |
| 1992 | 3.62066 |
| 1991 | 3.63329 |
| 1990 | 3.31397 |
| 1989 | 3.3462 |
| 1988 | 2.99676 |
| 1987 | - |
| 1986 | - |
| 1985 | - |
| 1984 | - |
| 1983 | - |
| 1982 | - |
| 1981 | 2.34263 |
| 1980 | 1.94575 |
| 1979 | 1.61536 |
| 1978 | 1.41715 |
| 1977 | 1.17482 |
| 1976 | 0.94008 |
| 1975 | 0.80175 |
| 1974 | 0.73314 |
| 1973 | 0.63305 |
| 1972 | 0.54186 |
| 1971 | 0.5106 |
| 1970 | - |
| 1969 | - |
| 1968 | - |
| 1967 | - |
| 1966 | - |
| 1965 | - |
| 1964 | - |
| 1963 | - |
| 1962 | - |
| 1961 | - |
| 1960 | - |