| 年份 | 尼日尔 |
|---|---|
| 2023 | - |
| 2022 | - |
| 2021 | 2700 |
| 2020 | 2800 |
| 2019 | 2900 |
| 2018 | 3000 |
| 2017 | 3200 |
| 2016 | 3300 |
| 2015 | 3700 |
| 2014 | 3900 |
| 2013 | 4200 |
| 2012 | 4500 |
| 2011 | 4700 |
| 2010 | 5000 |
| 2009 | 5500 |
| 2008 | 5600 |
| 2007 | 5700 |
| 2006 | 5600 |
| 2005 | 5500 |
| 2004 | 5300 |
| 2003 | 5100 |
| 2002 | 4800 |
| 2001 | 4500 |
| 2000 | 4100 |
| 1999 | 3700 |
| 1998 | 3300 |
| 1997 | 2800 |
| 1996 | 2400 |
| 1995 | 2000 |
| 1994 | 1600 |
| 1993 | 1200 |
| 1992 | 930 |
| 1991 | 680 |
| 1990 | 500 |
| 1989 | - |
| 1988 | - |
| 1987 | - |
| 1986 | - |
| 1985 | - |
| 1984 | - |
| 1983 | - |
| 1982 | - |
| 1981 | - |
| 1980 | - |
| 1979 | - |
| 1978 | - |
| 1977 | - |
| 1976 | - |
| 1975 | - |
| 1974 | - |
| 1973 | - |
| 1972 | - |
| 1971 | - |
| 1970 | - |
| 1969 | - |
| 1968 | - |
| 1967 | - |
| 1966 | - |
| 1965 | - |
| 1964 | - |
| 1963 | - |
| 1962 | - |
| 1961 | - |
| 1960 | - |