| 年份 | 尼日尔 |
|---|---|
| 2023 | - |
| 2022 | 16.894 |
| 2021 | 16.751 |
| 2020 | 16.626 |
| 2019 | 16.517 |
| 2018 | 16.425 |
| 2017 | 16.35 |
| 2016 | 16.29 |
| 2015 | 16.247 |
| 2014 | 16.219 |
| 2013 | 16.208 |
| 2012 | 16.212 |
| 2011 | 16.216 |
| 2010 | 16.221 |
| 2009 | 16.225 |
| 2008 | 16.229 |
| 2007 | 16.234 |
| 2006 | 16.238 |
| 2005 | 16.242 |
| 2004 | 16.247 |
| 2003 | 16.251 |
| 2002 | 16.255 |
| 2001 | 16.26 |
| 2000 | 16.186 |
| 1999 | 16.103 |
| 1998 | 16.02 |
| 1997 | 15.937 |
| 1996 | 15.855 |
| 1995 | 15.773 |
| 1994 | 15.691 |
| 1993 | 15.61 |
| 1992 | 15.529 |
| 1991 | 15.449 |
| 1990 | 15.368 |
| 1989 | 15.289 |
| 1988 | 15.209 |
| 1987 | 14.993 |
| 1986 | 14.763 |
| 1985 | 14.536 |
| 1984 | 14.312 |
| 1983 | 14.09 |
| 1982 | 13.871 |
| 1981 | 13.656 |
| 1980 | 13.443 |
| 1979 | 13.233 |
| 1978 | 13.025 |
| 1977 | 12.648 |
| 1976 | 12.021 |
| 1975 | 11.419 |
| 1974 | 10.845 |
| 1973 | 10.296 |
| 1972 | 9.772 |
| 1971 | 9.271 |
| 1970 | 8.794 |
| 1969 | 8.339 |
| 1968 | 7.906 |
| 1967 | 7.493 |
| 1966 | 7.1 |
| 1965 | 6.809 |
| 1964 | 6.529 |
| 1963 | 6.259 |
| 1962 | 6 |
| 1961 | 5.896 |
| 1960 | 5.793 |