| 年份 | 尼日利亚 |
|---|---|
| 2023 | - |
| 2022 | - |
| 2021 | - |
| 2020 | - |
| 2019 | - |
| 2018 | - |
| 2017 | - |
| 2016 | - |
| 2015 | - |
| 2014 | - |
| 2013 | - |
| 2012 | - |
| 2011 | - |
| 2010 | - |
| 2009 | - |
| 2008 | - |
| 2007 | 6.7027 |
| 2006 | 6.52147 |
| 2005 | 6.38889 |
| 2004 | 6.57143 |
| 2003 | 6.28571 |
| 2002 | 6.17647 |
| 2001 | 6.06242 |
| 2000 | 5.54286 |
| 1999 | 5.38571 |
| 1998 | 5.38235 |
| 1997 | 5.34639 |
| 1996 | 5.19637 |
| 1995 | 5.06079 |
| 1994 | 5.19355 |
| 1993 | 5.16611 |
| 1992 | 4.98339 |
| 1991 | 4.81667 |
| 1990 | 4.93363 |
| 1989 | 4.75292 |
| 1988 | 4.55322 |
| 1987 | 4.39352 |
| 1986 | 4.19957 |
| 1985 | 4.84783 |
| 1984 | 5.04762 |
| 1983 | 5.74122 |
| 1982 | 5.44975 |
| 1981 | 5.43544 |
| 1980 | 4.28506 |
| 1979 | 4.43102 |
| 1978 | 3.87165 |
| 1977 | 3.27495 |
| 1976 | 2.38462 |
| 1975 | 2.17308 |
| 1974 | 1.88889 |
| 1973 | 1.46067 |
| 1972 | 1.53846 |
| 1971 | 1.13758 |
| 1970 | 0.909648 |
| 1969 | 0.67696 |
| 1968 | 0.617031 |
| 1967 | 0.547704 |
| 1966 | 0.479599 |
| 1965 | 0.338179 |
| 1964 | 0.236613 |
| 1963 | 0.226271 |
| 1962 | 0.22541 |
| 1961 | 0.21118 |
| 1960 | - |