| 年份 | 尼日尔 |
|---|---|
| 2023 | - |
| 2022 | - |
| 2021 | 4.88873 |
| 2020 | 4.9284 |
| 2019 | 4.74234 |
| 2018 | 4.93099 |
| 2017 | 7.97567 |
| 2016 | 8.6396 |
| 2015 | 8.71509 |
| 2014 | 7.36981 |
| 2013 | 7.04364 |
| 2012 | 7.25651 |
| 2011 | 6.68949 |
| 2010 | 6.47924 |
| 2009 | 7.66292 |
| 2008 | 7.5717 |
| 2007 | 7.86422 |
| 2006 | 6.53979 |
| 2005 | 6.93109 |
| 2004 | 7.37654 |
| 2003 | 9.23078 |
| 2002 | 6.97803 |
| 2001 | 6.50698 |
| 2000 | 7.23578 |
| 1999 | 5.83537 |
| 1998 | 8.6296 |
| 1997 | 9.39694 |
| 1996 | 9.35246 |
| 1995 | 9.59597 |
| 1994 | 7.51751 |
| 1993 | 3.95215 |
| 1992 | 4.14078 |
| 1991 | 4.00384 |
| 1990 | 3.6884 |
| 1989 | 4.72031 |
| 1988 | 4.27251 |
| 1987 | 3.92723 |
| 1986 | 4.59214 |
| 1985 | 3.79019 |
| 1984 | 4.90758 |
| 1983 | 4.08565 |
| 1982 | 5.34638 |
| 1981 | 3.47043 |
| 1980 | 3.33819 |
| 1979 | 3.21431 |
| 1978 | 3.92906 |
| 1977 | 5.2276 |
| 1976 | 3.58416 |
| 1975 | 3.89527 |
| 1974 | 2.87006 |
| 1973 | 2.75747 |
| 1972 | 2.0001 |
| 1971 | 1.7981 |
| 1970 | 2.15131 |
| 1969 | - |
| 1968 | - |
| 1967 | - |
| 1966 | - |
| 1965 | - |
| 1964 | - |
| 1963 | - |
| 1962 | - |
| 1961 | - |
| 1960 | - |