| 年份 | 尼日尔 |
|---|---|
| 2023 | - |
| 2022 | 100.195 |
| 2021 | 100.47 |
| 2020 | 100.684 |
| 2019 | 100.842 |
| 2018 | 100.97 |
| 2017 | 101.068 |
| 2016 | 101.183 |
| 2015 | 101.367 |
| 2014 | 101.533 |
| 2013 | 101.601 |
| 2012 | 101.64 |
| 2011 | 101.54 |
| 2010 | 101.17 |
| 2009 | 100.633 |
| 2008 | 99.9607 |
| 2007 | 99.1997 |
| 2006 | 98.3781 |
| 2005 | 97.5152 |
| 2004 | 96.6108 |
| 2003 | 95.7053 |
| 2002 | 94.8641 |
| 2001 | 94.0968 |
| 2000 | 93.4196 |
| 1999 | 92.8392 |
| 1998 | 92.341 |
| 1997 | 91.9163 |
| 1996 | 91.6277 |
| 1995 | 91.5974 |
| 1994 | 91.7519 |
| 1993 | 91.9464 |
| 1992 | 92.1383 |
| 1991 | 92.3331 |
| 1990 | 92.5434 |
| 1989 | 92.779 |
| 1988 | 93.0023 |
| 1987 | 93.1404 |
| 1986 | 93.2235 |
| 1985 | 93.2233 |
| 1984 | 93.0823 |
| 1983 | 92.9073 |
| 1982 | 92.7596 |
| 1981 | 92.6267 |
| 1980 | 92.5601 |
| 1979 | 92.6397 |
| 1978 | 92.8857 |
| 1977 | 93.2864 |
| 1976 | 93.8134 |
| 1975 | 94.4141 |
| 1974 | 95.0513 |
| 1973 | 95.6924 |
| 1972 | 96.3246 |
| 1971 | 96.9404 |
| 1970 | 97.5296 |
| 1969 | 98.0781 |
| 1968 | 98.577 |
| 1967 | 99.0055 |
| 1966 | 99.3576 |
| 1965 | 99.6595 |
| 1964 | 99.1369 |
| 1963 | 98.005 |
| 1962 | 97.4493 |
| 1961 | 97.4165 |
| 1960 | 97.605 |