| 年份 | 尼日尔 |
|---|---|
| 2023 | - |
| 2022 | - |
| 2021 | 59.5 |
| 2020 | 59.9 |
| 2019 | 60.2 |
| 2018 | 60.4 |
| 2017 | 60.6 |
| 2016 | 60.9 |
| 2015 | 61.3 |
| 2014 | 61.8 |
| 2013 | 62.4 |
| 2012 | 63.3 |
| 2011 | 64.4 |
| 2010 | 65.8 |
| 2009 | 67.7 |
| 2008 | 69.9 |
| 2007 | 72.5 |
| 2006 | 75.6 |
| 2005 | 79 |
| 2004 | 82.9 |
| 2003 | 86.9 |
| 2002 | 90.9 |
| 2001 | 94.7 |
| 2000 | 98.2 |
| 1999 | 101.4 |
| 1998 | 104.6 |
| 1997 | 108.1 |
| 1996 | 111.9 |
| 1995 | 116.3 |
| 1994 | 120.8 |
| 1993 | 125 |
| 1992 | 128.6 |
| 1991 | 131.5 |
| 1990 | 133.8 |
| 1989 | 135.6 |
| 1988 | 136.7 |
| 1987 | 137.1 |
| 1986 | 136.8 |
| 1985 | 135.7 |
| 1984 | 134.3 |
| 1983 | 132.7 |
| 1982 | 131.4 |
| 1981 | 130.6 |
| 1980 | 130.8 |
| 1979 | 131.7 |
| 1978 | 133.2 |
| 1977 | 135 |
| 1976 | 136.6 |
| 1975 | 137.6 |
| 1974 | 137.9 |
| 1973 | 137.6 |
| 1972 | 136.5 |
| 1971 | 135.2 |
| 1970 | 133.6 |
| 1969 | 132 |
| 1968 | 130.5 |
| 1967 | 129.1 |
| 1966 | - |
| 1965 | - |
| 1964 | - |
| 1963 | - |
| 1962 | - |
| 1961 | - |
| 1960 | - |