| 年份 | 尼日尔 |
|---|---|
| 2023 | - |
| 2022 | - |
| 2021 | 222.879 |
| 2020 | 226.218 |
| 2019 | 197.324 |
| 2018 | 204.492 |
| 2017 | 203.484 |
| 2016 | 208.822 |
| 2015 | 213.254 |
| 2014 | 217.746 |
| 2013 | 222.732 |
| 2012 | 228.399 |
| 2011 | 231.214 |
| 2010 | 234.331 |
| 2009 | 242.832 |
| 2008 | 248.561 |
| 2007 | 255.087 |
| 2006 | 261.797 |
| 2005 | 268.731 |
| 2004 | 274.755 |
| 2003 | 287.272 |
| 2002 | 287.043 |
| 2001 | 287.858 |
| 2000 | 285.544 |
| 1999 | 284.466 |
| 1998 | 281.689 |
| 1997 | 283.712 |
| 1996 | 285.246 |
| 1995 | 287.226 |
| 1994 | 289.757 |
| 1993 | 294.662 |
| 1992 | 301.117 |
| 1991 | 306.779 |
| 1990 | 308.128 |
| 1989 | 316.888 |
| 1988 | 324.411 |
| 1987 | 331.679 |
| 1986 | 342.605 |
| 1985 | 348.716 |
| 1984 | 353.902 |
| 1983 | 350.934 |
| 1982 | 355.661 |
| 1981 | 359.421 |
| 1980 | 366.761 |
| 1979 | 370.824 |
| 1978 | 382.397 |
| 1977 | 393.171 |
| 1976 | 403.834 |
| 1975 | 405.829 |
| 1974 | 426.269 |
| 1973 | 439.48 |
| 1972 | 449.474 |
| 1971 | 460.015 |
| 1970 | 448.19 |
| 1969 | 446.454 |
| 1968 | 445.437 |
| 1967 | 446.329 |
| 1966 | 446.861 |
| 1965 | 448.903 |
| 1964 | 449.217 |
| 1963 | 449.659 |
| 1962 | 453.114 |
| 1961 | 454.666 |
| 1960 | 459.639 |