| 年份 | 尼日尔 |
|---|---|
| 2023 | - |
| 2022 | 545.413 |
| 2021 | 507.71 |
| 2020 | 519.696 |
| 2019 | 520.935 |
| 2018 | 510.596 |
| 2017 | 494.635 |
| 2016 | 489.434 |
| 2015 | 481.111 |
| 2014 | 478.855 |
| 2013 | 466.334 |
| 2012 | 460.032 |
| 2011 | 432.298 |
| 2010 | 438.464 |
| 2009 | 419.173 |
| 2008 | 426.606 |
| 2007 | 410.803 |
| 2006 | 413.056 |
| 2005 | 404.281 |
| 2004 | 390.425 |
| 2003 | 403.064 |
| 2002 | 408.571 |
| 2001 | 403.177 |
| 2000 | 389.078 |
| 1999 | 407.554 |
| 1998 | 422.62 |
| 1997 | 397.505 |
| 1996 | 404.804 |
| 1995 | 418.244 |
| 1994 | 421.999 |
| 1993 | 427.846 |
| 1992 | 440.14 |
| 1991 | 445.15 |
| 1990 | 461.216 |
| 1989 | 481.989 |
| 1988 | 492.207 |
| 1987 | 474.774 |
| 1986 | 488.968 |
| 1985 | 473.884 |
| 1984 | 453.414 |
| 1983 | 561.794 |
| 1982 | 602.369 |
| 1981 | 607.902 |
| 1980 | 628.032 |
| 1979 | 663.843 |
| 1978 | 638.415 |
| 1977 | 579.126 |
| 1976 | 552.678 |
| 1975 | 564.29 |
| 1974 | 596.47 |
| 1973 | 563.221 |
| 1972 | 697.308 |
| 1971 | 755.107 |
| 1970 | 734.014 |
| 1969 | 732.116 |
| 1968 | 796.534 |
| 1967 | 816.343 |
| 1966 | 839.138 |
| 1965 | 867.085 |
| 1964 | 834.968 |
| 1963 | 858.811 |
| 1962 | 808.424 |
| 1961 | 755.16 |
| 1960 | 744.026 |