| 年份 | 尼日利亚 |
|---|---|
| 2023 | - |
| 2022 | 2.97449 |
| 2021 | 2.98162 |
| 2020 | 3.00253 |
| 2019 | 3.01014 |
| 2018 | 3.0098 |
| 2017 | 3.01288 |
| 2016 | 3.01893 |
| 2015 | 3.0261 |
| 2014 | 3.04262 |
| 2013 | 3.06369 |
| 2012 | 3.07453 |
| 2011 | 3.0778 |
| 2010 | 3.07868 |
| 2009 | 3.07889 |
| 2008 | 3.08011 |
| 2007 | 3.08273 |
| 2006 | 3.08531 |
| 2005 | 3.08824 |
| 2004 | 3.09225 |
| 2003 | 3.09616 |
| 2002 | 3.10012 |
| 2001 | 3.10522 |
| 2000 | 3.11107 |
| 1999 | 3.11844 |
| 1998 | 3.12806 |
| 1997 | 3.13953 |
| 1996 | 3.15181 |
| 1995 | 3.16455 |
| 1994 | 3.17755 |
| 1993 | 3.18802 |
| 1992 | 3.19562 |
| 1991 | 3.20124 |
| 1990 | 3.20449 |
| 1989 | 3.20593 |
| 1988 | 3.20578 |
| 1987 | 3.20541 |
| 1986 | 3.20537 |
| 1985 | 3.20506 |
| 1984 | 3.20414 |
| 1983 | 3.20434 |
| 1982 | 3.20505 |
| 1981 | 3.20588 |
| 1980 | 3.20938 |
| 1979 | 3.21454 |
| 1978 | 3.21904 |
| 1977 | 3.22364 |
| 1976 | 3.22798 |
| 1975 | 3.23412 |
| 1974 | 3.24339 |
| 1973 | 3.25226 |
| 1972 | 3.2603 |
| 1971 | 3.26956 |
| 1970 | 3.28209 |
| 1969 | 3.29785 |
| 1968 | 3.31595 |
| 1967 | 3.33867 |
| 1966 | 3.35893 |
| 1965 | 3.36984 |
| 1964 | 3.37412 |
| 1963 | 3.37081 |
| 1962 | 3.36005 |
| 1961 | 3.34441 |
| 1960 | 3.32642 |