| 年份 | 尼日尔 |
|---|---|
| 2023 | - |
| 2022 | 585.405 |
| 2021 | 590.63 |
| 2020 | 564.842 |
| 2019 | 549.816 |
| 2018 | 568.6 |
| 2017 | 514.543 |
| 2016 | 497.036 |
| 2015 | 481.111 |
| 2014 | 560.754 |
| 2013 | 548.158 |
| 2012 | 525.047 |
| 2011 | 507.603 |
| 2010 | 471.613 |
| 2009 | 458.422 |
| 2008 | 472.178 |
| 2007 | 384.718 |
| 2006 | 331.104 |
| 2005 | 316.366 |
| 2004 | 281.325 |
| 2003 | 263.091 |
| 2002 | 223.352 |
| 2001 | 203.526 |
| 2000 | 192.878 |
| 1999 | 225.954 |
| 1998 | 243.518 |
| 1997 | 218.246 |
| 1996 | 237.015 |
| 1995 | 234.62 |
| 1994 | 204.15 |
| 1993 | 332.062 |
| 1992 | 380.149 |
| 1991 | 380.537 |
| 1990 | 419.604 |
| 1989 | 268.549 |
| 1988 | 289.67 |
| 1987 | 292.409 |
| 1986 | 257.02 |
| 1985 | 200.425 |
| 1984 | 209.532 |
| 1983 | 266.47 |
| 1982 | 307.355 |
| 1981 | 341 |
| 1980 | 406.359 |
| 1979 | 352.301 |
| 1978 | 305.38 |
| 1977 | 228.791 |
| 1976 | 193.949 |
| 1975 | 196.403 |
| 1974 | 197.464 |
| 1973 | 187.055 |
| 1972 | 150.778 |
| 1971 | 144.583 |
| 1970 | 139.177 |
| 1969 | 137.766 |
| 1968 | 145.138 |
| 1967 | 154.994 |
| 1966 | 168.315 |
| 1965 | 166.123 |
| 1964 | 148.035 |
| 1963 | 153.372 |
| 1962 | 143.284 |
| 1961 | 134.846 |
| 1960 | 128.531 |