| 年份 | 尼日尔 |
|---|---|
| 2023 | - |
| 2022 | - |
| 2021 | 63.0961 |
| 2020 | 62.7022 |
| 2019 | 66.4591 |
| 2018 | 65.3763 |
| 2017 | 65.275 |
| 2016 | 64.4017 |
| 2015 | 63.626 |
| 2014 | 62.7999 |
| 2013 | 61.906 |
| 2012 | 60.8672 |
| 2011 | 60.1335 |
| 2010 | 59.2926 |
| 2009 | 57.7708 |
| 2008 | 56.5573 |
| 2007 | 55.2096 |
| 2006 | 53.8258 |
| 2005 | 52.3936 |
| 2004 | 51.0526 |
| 2003 | 49.055 |
| 2002 | 48.3662 |
| 2001 | 47.6236 |
| 2000 | 47.238 |
| 1999 | 46.7663 |
| 1998 | 46.4251 |
| 1997 | 45.594 |
| 1996 | 44.7035 |
| 1995 | 43.7065 |
| 1994 | 42.6838 |
| 1993 | 41.5297 |
| 1992 | 40.3515 |
| 1991 | 39.3338 |
| 1990 | 38.8204 |
| 1989 | 37.7569 |
| 1988 | 36.9699 |
| 1987 | 36.3341 |
| 1986 | 35.5107 |
| 1985 | 35.1841 |
| 1984 | 35.0058 |
| 1983 | 35.4894 |
| 1982 | 35.3085 |
| 1981 | 35.1146 |
| 1980 | 34.485 |
| 1979 | 34.0809 |
| 1978 | 32.9207 |
| 1977 | 31.8537 |
| 1976 | 30.8277 |
| 1975 | 30.5664 |
| 1974 | 28.9826 |
| 1973 | 28.0725 |
| 1972 | 27.4502 |
| 1971 | 26.7835 |
| 1970 | 27.8976 |
| 1969 | 28.2439 |
| 1968 | 28.4875 |
| 1967 | 28.5929 |
| 1966 | 28.5619 |
| 1965 | 28.3954 |
| 1964 | 28.3764 |
| 1963 | 28.3592 |
| 1962 | 28.0727 |
| 1961 | 27.9637 |
| 1960 | 27.5579 |