| 年份 | 尼日尔 |
|---|---|
| 2023 | - |
| 2022 | 11.4897 |
| 2021 | 1.3836 |
| 2020 | 3.55064 |
| 2019 | 5.93985 |
| 2018 | 7.21142 |
| 2017 | 5.00536 |
| 2016 | 5.74089 |
| 2015 | 4.39265 |
| 2014 | 6.64214 |
| 2013 | 5.31513 |
| 2012 | 10.5489 |
| 2011 | 2.35776 |
| 2010 | 8.57817 |
| 2009 | 1.9626 |
| 2008 | 7.73141 |
| 2007 | 3.14272 |
| 2006 | 5.93105 |
| 2005 | 7.33187 |
| 2004 | 0.363802 |
| 2003 | 2.17061 |
| 2002 | 4.91847 |
| 2001 | 7.26814 |
| 2000 | -1.20848 |
| 1999 | -0.219563 |
| 1998 | 9.97262 |
| 1997 | 1.52748 |
| 1996 | 0.100531 |
| 1995 | 2.45724 |
| 1994 | 1.85478 |
| 1993 | 0.321655 |
| 1992 | 2.00075 |
| 1991 | -0.439489 |
| 1990 | -1.30848 |
| 1989 | 0.957046 |
| 1988 | 6.87115 |
| 1987 | 0.0882814 |
| 1986 | 6.35214 |
| 1985 | 7.71813 |
| 1984 | -16.8198 |
| 1983 | -3.86363 |
| 1982 | 2.17446 |
| 1981 | -0.177666 |
| 1980 | -2.45504 |
| 1979 | 7.147 |
| 1978 | 13.4726 |
| 1977 | 7.76458 |
| 1976 | 0.678203 |
| 1975 | -2.79319 |
| 1974 | 8.77524 |
| 1973 | -17.0476 |
| 1972 | -5.16627 |
| 1971 | 5.67932 |
| 1970 | 3.05578 |
| 1969 | -5.48595 |
| 1968 | 0.383495 |
| 1967 | 0.122869 |
| 1966 | -0.382497 |
| 1965 | 6.91976 |
| 1964 | 0.13104 |
| 1963 | 9.42823 |
| 1962 | 10.2787 |
| 1961 | 4.54639 |
| 1960 | - |