| 年份 | 尼日尔 |
|---|---|
| 2023 | - |
| 2022 | 83.106 |
| 2021 | 83.249 |
| 2020 | 83.374 |
| 2019 | 83.483 |
| 2018 | 83.575 |
| 2017 | 83.65 |
| 2016 | 83.71 |
| 2015 | 83.753 |
| 2014 | 83.781 |
| 2013 | 83.792 |
| 2012 | 83.788 |
| 2011 | 83.784 |
| 2010 | 83.779 |
| 2009 | 83.775 |
| 2008 | 83.771 |
| 2007 | 83.766 |
| 2006 | 83.762 |
| 2005 | 83.758 |
| 2004 | 83.753 |
| 2003 | 83.749 |
| 2002 | 83.745 |
| 2001 | 83.74 |
| 2000 | 83.814 |
| 1999 | 83.897 |
| 1998 | 83.98 |
| 1997 | 84.063 |
| 1996 | 84.145 |
| 1995 | 84.227 |
| 1994 | 84.309 |
| 1993 | 84.39 |
| 1992 | 84.471 |
| 1991 | 84.551 |
| 1990 | 84.632 |
| 1989 | 84.711 |
| 1988 | 84.791 |
| 1987 | 85.007 |
| 1986 | 85.237 |
| 1985 | 85.464 |
| 1984 | 85.688 |
| 1983 | 85.91 |
| 1982 | 86.129 |
| 1981 | 86.344 |
| 1980 | 86.557 |
| 1979 | 86.767 |
| 1978 | 86.975 |
| 1977 | 87.352 |
| 1976 | 87.979 |
| 1975 | 88.581 |
| 1974 | 89.155 |
| 1973 | 89.704 |
| 1972 | 90.228 |
| 1971 | 90.729 |
| 1970 | 91.206 |
| 1969 | 91.661 |
| 1968 | 92.094 |
| 1967 | 92.507 |
| 1966 | 92.9 |
| 1965 | 93.191 |
| 1964 | 93.471 |
| 1963 | 93.741 |
| 1962 | 94 |
| 1961 | 94.104 |
| 1960 | 94.207 |