| 年份 | 尼日利亚 |
|---|---|
| 2023 | - |
| 2022 | 12.5624 |
| 2021 | 12.5499 |
| 2020 | 12.5201 |
| 2019 | 12.4792 |
| 2018 | 12.425 |
| 2017 | 12.3714 |
| 2016 | 12.3138 |
| 2015 | 12.2398 |
| 2014 | 12.1551 |
| 2013 | 12.0565 |
| 2012 | 11.9546 |
| 2011 | 11.877 |
| 2010 | 11.8249 |
| 2009 | 11.7931 |
| 2008 | 11.7853 |
| 2007 | 11.7849 |
| 2006 | 11.7716 |
| 2005 | 11.7527 |
| 2004 | 11.7427 |
| 2003 | 11.7442 |
| 2002 | 11.7616 |
| 2001 | 11.8056 |
| 2000 | 11.8781 |
| 1999 | 11.9748 |
| 1998 | 12.0981 |
| 1997 | 12.2354 |
| 1996 | 12.3604 |
| 1995 | 12.4633 |
| 1994 | 12.5386 |
| 1993 | 12.5797 |
| 1992 | 12.5834 |
| 1991 | 12.5495 |
| 1990 | 12.4826 |
| 1989 | 12.3835 |
| 1988 | 12.241 |
| 1987 | 12.0745 |
| 1986 | 11.9096 |
| 1985 | 11.7444 |
| 1984 | 11.59 |
| 1983 | 11.4671 |
| 1982 | 11.3794 |
| 1981 | 11.3235 |
| 1980 | 11.3074 |
| 1979 | 11.3255 |
| 1978 | 11.3574 |
| 1977 | 11.3966 |
| 1976 | 11.4277 |
| 1975 | 11.441 |
| 1974 | 11.4364 |
| 1973 | 11.4126 |
| 1972 | 11.3761 |
| 1971 | 11.3355 |
| 1970 | 11.299 |
| 1969 | 11.2674 |
| 1968 | 11.2383 |
| 1967 | 11.2084 |
| 1966 | 11.1826 |
| 1965 | 11.1646 |
| 1964 | 11.0813 |
| 1963 | 10.9801 |
| 1962 | 10.9702 |
| 1961 | 11.0146 |
| 1960 | 11.081 |