| 年份 | 尼日尔 |
|---|---|
| 2023 | - |
| 2022 | - |
| 2021 | 14.8055 |
| 2020 | - |
| 2019 | 15.5063 |
| 2018 | 16.4101 |
| 2017 | 14.9539 |
| 2016 | 14.0857 |
| 2015 | 12.5626 |
| 2014 | 9.72836 |
| 2013 | 9.57514 |
| 2012 | 9.20625 |
| 2011 | 8.10612 |
| 2010 | 7.06894 |
| 2009 | 7.16825 |
| 2008 | 7.26344 |
| 2007 | 6.27936 |
| 2006 | 6.45229 |
| 2005 | 5.88552 |
| 2004 | 5.60956 |
| 2003 | 3.422 |
| 2002 | 3.55865 |
| 2001 | 3.87533 |
| 2000 | 3.8958 |
| 1999 | - |
| 1998 | - |
| 1997 | 4.36158 |
| 1996 | - |
| 1995 | - |
| 1994 | - |
| 1993 | - |
| 1992 | 2.74311 |
| 1991 | 2.66007 |
| 1990 | 2.83257 |
| 1989 | 2.30699 |
| 1988 | - |
| 1987 | - |
| 1986 | - |
| 1985 | - |
| 1984 | - |
| 1983 | - |
| 1982 | - |
| 1981 | 2.1715 |
| 1980 | - |
| 1979 | 1.38969 |
| 1978 | 1.02315 |
| 1977 | 0.98541 |
| 1976 | 0.77298 |
| 1975 | 0.67007 |
| 1974 | 0.69005 |
| 1973 | 0.55673 |
| 1972 | 0.32588 |
| 1971 | 0.26105 |
| 1970 | - |
| 1969 | - |
| 1968 | - |
| 1967 | - |
| 1966 | - |
| 1965 | - |
| 1964 | - |
| 1963 | - |
| 1962 | - |
| 1961 | - |
| 1960 | - |