| 年份 | 尼日尔 |
|---|---|
| 2023 | - |
| 2022 | - |
| 2021 | 17.1056 |
| 2020 | - |
| 2019 | 19.2208 |
| 2018 | 20.823 |
| 2017 | 19.8362 |
| 2016 | 18.3165 |
| 2015 | 17.1636 |
| 2014 | 13.9806 |
| 2013 | 13.7309 |
| 2012 | 13.1397 |
| 2011 | 11.4227 |
| 2010 | 9.83269 |
| 2009 | 10.0402 |
| 2008 | 9.71117 |
| 2007 | 8.27712 |
| 2006 | 8.72388 |
| 2005 | 7.69682 |
| 2004 | 7.29832 |
| 2003 | 5.70201 |
| 2002 | 4.7659 |
| 2001 | 5.24305 |
| 2000 | 5.09345 |
| 1999 | - |
| 1998 | - |
| 1997 | 7.51529 |
| 1996 | - |
| 1995 | - |
| 1994 | - |
| 1993 | - |
| 1992 | 6.45023 |
| 1991 | 6.58561 |
| 1990 | 6.12407 |
| 1989 | 5.73024 |
| 1988 | - |
| 1987 | - |
| 1986 | - |
| 1985 | - |
| 1984 | - |
| 1983 | - |
| 1982 | - |
| 1981 | 5.24304 |
| 1980 | - |
| 1979 | 3.32335 |
| 1978 | 2.79554 |
| 1977 | 2.71626 |
| 1976 | 1.927 |
| 1975 | 1.99269 |
| 1974 | 1.79826 |
| 1973 | 1.54773 |
| 1972 | 1.22278 |
| 1971 | 0.87225 |
| 1970 | - |
| 1969 | - |
| 1968 | - |
| 1967 | - |
| 1966 | - |
| 1965 | - |
| 1964 | - |
| 1963 | - |
| 1962 | - |
| 1961 | - |
| 1960 | - |