| 年份 | 尼日尔 |
|---|---|
| 2023 | - |
| 2022 | - |
| 2021 | 6.40907 |
| 2020 | 5.56826 |
| 2019 | 5.81264 |
| 2018 | 6.7961 |
| 2017 | 9.37929 |
| 2016 | 9.68635 |
| 2015 | 9.74016 |
| 2014 | 10.2731 |
| 2013 | 11.4669 |
| 2012 | 10.3335 |
| 2011 | 8.14771 |
| 2010 | 6.88472 |
| 2009 | 7.9622 |
| 2008 | 7.94564 |
| 2007 | 8.30058 |
| 2006 | 6.8946 |
| 2005 | 7.20852 |
| 2004 | 7.5076 |
| 2003 | 9.26317 |
| 2002 | 7.01295 |
| 2001 | 6.55942 |
| 2000 | 7.26832 |
| 1999 | 5.85596 |
| 1998 | 8.72521 |
| 1997 | 9.53509 |
| 1996 | 9.40914 |
| 1995 | 9.66586 |
| 1994 | 7.5656 |
| 1993 | 3.98117 |
| 1992 | 4.17192 |
| 1991 | 4.04601 |
| 1990 | 3.72817 |
| 1989 | 4.78733 |
| 1988 | 4.32141 |
| 1987 | 3.9688 |
| 1986 | 4.64311 |
| 1985 | 3.91678 |
| 1984 | 5.12176 |
| 1983 | 4.18981 |
| 1982 | 5.40538 |
| 1981 | 3.51664 |
| 1980 | 3.37707 |
| 1979 | 3.24709 |
| 1978 | 3.9585 |
| 1977 | 5.26028 |
| 1976 | 3.59821 |
| 1975 | 3.90347 |
| 1974 | 2.89703 |
| 1973 | 2.76124 |
| 1972 | 2.0001 |
| 1971 | 1.7981 |
| 1970 | 2.15643 |
| 1969 | - |
| 1968 | - |
| 1967 | - |
| 1966 | - |
| 1965 | - |
| 1964 | - |
| 1963 | - |
| 1962 | - |
| 1961 | - |
| 1960 | - |