| 年份 | 尼日利亚  | 
                                                            
|---|---|
| 2023 | - | 
| 2022 | 4.66379 | 
| 2021 | 4.64698 | 
| 2020 | 4.61854 | 
| 2019 | 4.57845 | 
| 2018 | 4.52477 | 
| 2017 | 4.46395 | 
| 2016 | 4.40468 | 
| 2015 | 4.3452 | 
| 2014 | 4.28764 | 
| 2013 | 4.24065 | 
| 2012 | 4.20573 | 
| 2011 | 4.18143 | 
| 2010 | 4.17011 | 
| 2009 | 4.1712 | 
| 2008 | 4.1801 | 
| 2007 | 4.19352 | 
| 2006 | 4.20767 | 
| 2005 | 4.21982 | 
| 2004 | 4.22916 | 
| 2003 | 4.23679 | 
| 2002 | 4.24385 | 
| 2001 | 4.25082 | 
| 2000 | 4.25855 | 
| 1999 | 4.26571 | 
| 1998 | 4.27036 | 
| 1997 | 4.27223 | 
| 1996 | 4.27418 | 
| 1995 | 4.27706 | 
| 1994 | 4.25456 | 
| 1993 | 4.22408 | 
| 1992 | 4.22647 | 
| 1991 | 4.24947 | 
| 1990 | 4.28173 | 
| 1989 | 4.34908 | 
| 1988 | 4.42686 | 
| 1987 | 4.46574 | 
| 1986 | 4.48164 | 
| 1985 | 4.48929 | 
| 1984 | 4.4968 | 
| 1983 | 4.51014 | 
| 1982 | 4.52893 | 
| 1981 | 4.54852 | 
| 1980 | 4.5655 | 
| 1979 | 4.58 | 
| 1978 | 4.59234 | 
| 1977 | 4.60188 | 
| 1976 | 4.61249 | 
| 1975 | 4.62684 | 
| 1974 | 4.64198 | 
| 1973 | 4.65501 | 
| 1972 | 4.66639 | 
| 1971 | 4.67708 | 
| 1970 | 4.68656 | 
| 1969 | 4.69543 | 
| 1968 | 4.70517 | 
| 1967 | 4.7147 | 
| 1966 | 4.72381 | 
| 1965 | 4.73222 | 
| 1964 | 4.73962 | 
| 1963 | 4.74645 | 
| 1962 | 4.75108 | 
| 1961 | 4.75103 | 
| 1960 | 4.74524 |