| 年份 | 尼日利亚 |
|---|---|
| 2023 | - |
| 2022 | 5.37255 |
| 2021 | 5.41877 |
| 2020 | 5.45681 |
| 2019 | 5.48513 |
| 2018 | 5.50207 |
| 2017 | 5.50479 |
| 2016 | 5.49444 |
| 2015 | 5.47278 |
| 2014 | 5.43787 |
| 2013 | 5.38483 |
| 2012 | 5.32256 |
| 2011 | 5.2616 |
| 2010 | 5.19948 |
| 2009 | 5.13953 |
| 2008 | 5.09157 |
| 2007 | 5.05536 |
| 2006 | 5.02895 |
| 2005 | 5.01621 |
| 2004 | 5.01523 |
| 2003 | 5.0212 |
| 2002 | 5.03169 |
| 2001 | 5.04098 |
| 2000 | 5.04579 |
| 1999 | 5.04513 |
| 1998 | 5.03913 |
| 1997 | 5.03085 |
| 1996 | 5.02502 |
| 1995 | 5.02363 |
| 1994 | 5.02301 |
| 1993 | 5.02142 |
| 1992 | 5.01793 |
| 1991 | 5.01437 |
| 1990 | 5.0089 |
| 1989 | 4.98427 |
| 1988 | 4.9605 |
| 1987 | 4.98362 |
| 1986 | 5.04926 |
| 1985 | 5.13455 |
| 1984 | 5.24983 |
| 1983 | 5.37356 |
| 1982 | 5.44854 |
| 1981 | 5.47847 |
| 1980 | 5.49107 |
| 1979 | 5.50012 |
| 1978 | 5.51656 |
| 1977 | 5.53853 |
| 1976 | 5.56097 |
| 1975 | 5.58007 |
| 1974 | 5.59365 |
| 1973 | 5.60077 |
| 1972 | 5.60197 |
| 1971 | 5.60308 |
| 1970 | 5.60537 |
| 1969 | 5.60875 |
| 1968 | 5.61391 |
| 1967 | 5.61968 |
| 1966 | 5.6261 |
| 1965 | 5.63278 |
| 1964 | 5.64032 |
| 1963 | 5.64858 |
| 1962 | 5.65546 |
| 1961 | 5.65951 |
| 1960 | 5.66032 |