| 年份 | 尼日利亚 |
|---|---|
| 2023 | - |
| 2022 | 16.1503 |
| 2021 | 16.2796 |
| 2020 | 16.4058 |
| 2019 | 16.545 |
| 2018 | 16.6971 |
| 2017 | 16.8671 |
| 2016 | 17.0484 |
| 2015 | 17.2215 |
| 2014 | 17.3772 |
| 2013 | 17.5132 |
| 2012 | 17.6157 |
| 2011 | 17.6782 |
| 2010 | 17.7156 |
| 2009 | 17.7302 |
| 2008 | 17.7245 |
| 2007 | 17.7152 |
| 2006 | 17.6989 |
| 2005 | 17.6629 |
| 2004 | 17.6068 |
| 2003 | 17.5183 |
| 2002 | 17.4122 |
| 2001 | 17.3267 |
| 2000 | 17.2694 |
| 1999 | 17.2367 |
| 1998 | 17.2315 |
| 1997 | 17.2352 |
| 1996 | 17.2239 |
| 1995 | 17.2007 |
| 1994 | 17.1842 |
| 1993 | 17.1809 |
| 1992 | 17.1939 |
| 1991 | 17.2368 |
| 1990 | 17.3229 |
| 1989 | 17.4518 |
| 1988 | 17.625 |
| 1987 | 17.8212 |
| 1986 | 18.001 |
| 1985 | 18.1584 |
| 1984 | 18.2911 |
| 1983 | 18.3837 |
| 1982 | 18.4349 |
| 1981 | 18.4508 |
| 1980 | 18.4363 |
| 1979 | 18.3841 |
| 1978 | 18.2715 |
| 1977 | 18.1276 |
| 1976 | 17.9741 |
| 1975 | 17.7992 |
| 1974 | 17.6203 |
| 1973 | 17.4694 |
| 1972 | 17.3511 |
| 1971 | 17.2569 |
| 1970 | 17.1994 |
| 1969 | 17.1742 |
| 1968 | 17.1543 |
| 1967 | 17.1373 |
| 1966 | 17.1055 |
| 1965 | 17.0521 |
| 1964 | 16.9884 |
| 1963 | 16.9177 |
| 1962 | 16.85 |
| 1961 | 16.7909 |
| 1960 | 16.7397 |