| 年份 | 尼日尔 |
|---|---|
| 2023 | - |
| 2022 | - |
| 2021 | 0.586468 |
| 2020 | 0.586468 |
| 2019 | 0.949462 |
| 2018 | 0.69477 |
| 2017 | 0.381645 |
| 2016 | 0.386007 |
| 2015 | 0.406191 |
| 2014 | 0.999243 |
| 2013 | 0.637151 |
| 2012 | 0.923295 |
| 2011 | 0.485641 |
| 2010 | 0.496026 |
| 2009 | 0.35349 |
| 2008 | 0.153418 |
| 2007 | 0.354908 |
| 2006 | 0.527623 |
| 2005 | 0.387666 |
| 2004 | 0.239986 |
| 2003 | 0.293665 |
| 2002 | 0.61182 |
| 2001 | 0.356621 |
| 2000 | 0.323721 |
| 1999 | 0.299485 |
| 1998 | 0.0357552 |
| 1997 | 0.0500536 |
| 1996 | 0.643547 |
| 1995 | 0.71355 |
| 1994 | 0.470928 |
| 1993 | 0.115509 |
| 1992 | 0.1078 |
| 1991 | 0.0438306 |
| 1990 | 0.208318 |
| 1989 | 0.286846 |
| 1988 | 0.182316 |
| 1987 | 0.300358 |
| 1986 | 0.203173 |
| 1985 | 0.365507 |
| 1984 | 0.239255 |
| 1983 | 0.179964 |
| 1982 | 0.285526 |
| 1981 | 0.569484 |
| 1980 | 0.263709 |
| 1979 | 0.18127 |
| 1978 | 0.171987 |
| 1977 | 0.213014 |
| 1976 | 0.117864 |
| 1975 | 0.0645458 |
| 1974 | 0.0160597 |
| 1973 | 0.0360777 |
| 1972 | 0.0360691 |
| 1971 | 0.0224479 |
| 1970 | 0.0156292 |
| 1969 | 0.0284236 |
| 1968 | 0.0209446 |
| 1967 | 0.0256566 |
| 1966 | 0.00869717 |
| 1965 | 0.00869717 |
| 1964 | 0.00869641 |
| 1963 | - |
| 1962 | - |
| 1961 | - |
| 1960 | - |