| 年份 | 尼日尔 |
|---|---|
| 2023 | - |
| 2022 | - |
| 2021 | - |
| 2020 | - |
| 2019 | - |
| 2018 | - |
| 2017 | - |
| 2016 | 2.5723 |
| 2015 | 3.18584 |
| 2014 | 3.94711 |
| 2013 | 4.27254 |
| 2012 | 3.53599 |
| 2011 | 3.81738 |
| 2010 | 4.35362 |
| 2009 | 5.13726 |
| 2008 | 6.3384 |
| 2007 | 5.06428 |
| 2006 | 5.01485 |
| 2005 | 5.53433 |
| 2004 | 5.46733 |
| 2003 | 7.50451 |
| 2002 | 8.74751 |
| 2001 | 10.4848 |
| 2000 | 11.7228 |
| 1999 | 11.7928 |
| 1998 | 12.5252 |
| 1997 | 12.7986 |
| 1996 | 11.711 |
| 1995 | 19.6119 |
| 1994 | - |
| 1993 | 16.2565 |
| 1992 | 15.7523 |
| 1991 | 14.1529 |
| 1990 | 14.4883 |
| 1989 | 13.059 |
| 1988 | - |
| 1987 | 15.0687 |
| 1986 | 14.9999 |
| 1985 | 14.9994 |
| 1984 | 14.9991 |
| 1983 | 14.9992 |
| 1982 | 14.9995 |
| 1981 | 13.9991 |
| 1980 | 13.0012 |
| 1979 | 12.9986 |
| 1978 | 13.009 |
| 1977 | 13.1116 |
| 1976 | 13.2683 |
| 1975 | 16.0701 |
| 1974 | 17.8025 |
| 1973 | 19.1264 |
| 1972 | 20.2799 |
| 1971 | 19.8017 |
| 1970 | - |
| 1969 | - |
| 1968 | - |
| 1967 | - |
| 1966 | - |
| 1965 | - |
| 1964 | - |
| 1963 | - |
| 1962 | - |
| 1961 | - |
| 1960 | - |