| 年份 | 尼日尔 |
|---|---|
| 2023 | - |
| 2022 | - |
| 2021 | - |
| 2020 | - |
| 2019 | - |
| 2018 | - |
| 2017 | - |
| 2016 | 2.51379 |
| 2015 | 3.37181 |
| 2014 | 3.84801 |
| 2013 | 4.20479 |
| 2012 | 3.50732 |
| 2011 | 3.71968 |
| 2010 | 4.41761 |
| 2009 | 5.04703 |
| 2008 | 6.43963 |
| 2007 | 4.89577 |
| 2006 | 4.85448 |
| 2005 | 5.3438 |
| 2004 | 5.25972 |
| 2003 | 7.33426 |
| 2002 | 8.60567 |
| 2001 | 10.2289 |
| 2000 | 11.9371 |
| 1999 | 12.1626 |
| 1998 | 12.6601 |
| 1997 | 12.9949 |
| 1996 | 16.2899 |
| 1995 | 18.3127 |
| 1994 | - |
| 1993 | 17.5648 |
| 1992 | 15.4011 |
| 1991 | 13.8062 |
| 1990 | 13.6657 |
| 1989 | 12.7522 |
| 1988 | - |
| 1987 | 14.9997 |
| 1986 | 14.9999 |
| 1985 | 14.9988 |
| 1984 | 14.5199 |
| 1983 | 14.8097 |
| 1982 | 14.9998 |
| 1981 | 14.3431 |
| 1980 | 13.3572 |
| 1979 | 13.8039 |
| 1978 | 12.3256 |
| 1977 | 12.7029 |
| 1976 | 13.0678 |
| 1975 | 15.979 |
| 1974 | 17.8328 |
| 1973 | 18.5565 |
| 1972 | 18.9421 |
| 1971 | 19.227 |
| 1970 | - |
| 1969 | - |
| 1968 | - |
| 1967 | - |
| 1966 | - |
| 1965 | - |
| 1964 | - |
| 1963 | - |
| 1962 | - |
| 1961 | - |
| 1960 | - |