| 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 | - |