| 年份 | 尼日尔  | 
                                                            
|---|---|
| 2023 | - | 
| 2022 | 1.57397 | 
| 2021 | 1.58209 | 
| 2020 | 1.58995 | 
| 2019 | 1.59406 | 
| 2018 | 1.59477 | 
| 2017 | 1.5956 | 
| 2016 | 1.59599 | 
| 2015 | 1.59529 | 
| 2014 | 1.5891 | 
| 2013 | 1.58151 | 
| 2012 | 1.59095 | 
| 2011 | 1.62049 | 
| 2010 | 1.65992 | 
| 2009 | 1.71052 | 
| 2008 | 1.76461 | 
| 2007 | 1.79656 | 
| 2006 | 1.80237 | 
| 2005 | 1.79631 | 
| 2004 | 1.7848 | 
| 2003 | 1.77172 | 
| 2002 | 1.75894 | 
| 2001 | 1.74679 | 
| 2000 | 1.73506 | 
| 1999 | 1.72345 | 
| 1998 | 1.71281 | 
| 1997 | 1.70331 | 
| 1996 | 1.69422 | 
| 1995 | 1.68562 | 
| 1994 | 1.6765 | 
| 1993 | 1.66558 | 
| 1992 | 1.65385 | 
| 1991 | 1.64366 | 
| 1990 | 1.63638 | 
| 1989 | 1.63162 | 
| 1988 | 1.62952 | 
| 1987 | 1.63039 | 
| 1986 | 1.63293 | 
| 1985 | 1.63612 | 
| 1984 | 1.64017 | 
| 1983 | 1.64459 | 
| 1982 | 1.6485 | 
| 1981 | 1.65147 | 
| 1980 | 1.6527 | 
| 1979 | 1.65141 | 
| 1978 | 1.64689 | 
| 1977 | 1.6393 | 
| 1976 | 1.6298 | 
| 1975 | 1.61891 | 
| 1974 | 1.60726 | 
| 1973 | 1.59601 | 
| 1972 | 1.58446 | 
| 1971 | 1.57049 | 
| 1970 | 1.55254 | 
| 1969 | 1.53027 | 
| 1968 | 1.50235 | 
| 1967 | 1.4723 | 
| 1966 | 1.44936 | 
| 1965 | 1.43803 | 
| 1964 | 1.43856 | 
| 1963 | 1.45414 | 
| 1962 | 1.48043 | 
| 1961 | 1.50178 | 
| 1960 | 1.50878 |