| 年份 | 尼日利亚 |
|---|---|
| 2023 | - |
| 2022 | 5.39785 |
| 2021 | 5.44547 |
| 2020 | 5.48351 |
| 2019 | 5.51128 |
| 2018 | 5.52701 |
| 2017 | 5.52805 |
| 2016 | 5.51554 |
| 2015 | 5.49094 |
| 2014 | 5.45252 |
| 2013 | 5.39671 |
| 2012 | 5.33291 |
| 2011 | 5.2714 |
| 2010 | 5.20898 |
| 2009 | 5.14869 |
| 2008 | 5.10083 |
| 2007 | 5.06514 |
| 2006 | 5.03935 |
| 2005 | 5.0271 |
| 2004 | 5.02712 |
| 2003 | 5.03457 |
| 2002 | 5.0473 |
| 2001 | 5.06048 |
| 2000 | 5.07035 |
| 1999 | 5.07591 |
| 1998 | 5.07741 |
| 1997 | 5.07691 |
| 1996 | 5.07778 |
| 1995 | 5.0818 |
| 1994 | 5.08647 |
| 1993 | 5.08987 |
| 1992 | 5.09115 |
| 1991 | 5.09242 |
| 1990 | 5.09352 |
| 1989 | 5.06397 |
| 1988 | 5.02634 |
| 1987 | 5.02958 |
| 1986 | 5.06003 |
| 1985 | 5.10447 |
| 1984 | 5.19256 |
| 1983 | 5.2961 |
| 1982 | 5.35377 |
| 1981 | 5.38124 |
| 1980 | 5.39527 |
| 1979 | 5.40725 |
| 1978 | 5.42637 |
| 1977 | 5.45031 |
| 1976 | 5.47437 |
| 1975 | 5.49485 |
| 1974 | 5.50956 |
| 1973 | 5.51785 |
| 1972 | 5.5207 |
| 1971 | 5.52386 |
| 1970 | 5.52823 |
| 1969 | 5.53183 |
| 1968 | 5.53526 |
| 1967 | 5.53824 |
| 1966 | 5.54253 |
| 1965 | 5.54877 |
| 1964 | 5.55606 |
| 1963 | 5.56468 |
| 1962 | 5.57328 |
| 1961 | 5.58055 |
| 1960 | 5.5861 |