| 年份 | 尼日利亚 |
|---|---|
| 2023 | - |
| 2022 | - |
| 2021 | 18.6103 |
| 2020 | 18.6103 |
| 2019 | 18.6103 |
| 2018 | 18.8413 |
| 2017 | 20.2959 |
| 2016 | 10.735 |
| 2015 | 7.96585 |
| 2014 | 8.95757 |
| 2013 | 8.50913 |
| 2012 | 8.4272 |
| 2011 | 6.20177 |
| 2010 | 11.2146 |
| 2009 | 4.56588 |
| 2008 | 5.89698 |
| 2007 | 4.34055 |
| 2006 | 10.3153 |
| 2005 | 7.24118 |
| 2004 | 4.44964 |
| 2003 | 6.01739 |
| 2002 | 4.31467 |
| 2001 | 6.19898 |
| 2000 | 5.35714 |
| 1999 | 4.79143 |
| 1998 | 4.8 |
| 1997 | 4.14759 |
| 1996 | 5.24169 |
| 1995 | 5.56231 |
| 1994 | 9.54839 |
| 1993 | 15.3156 |
| 1992 | 14.6179 |
| 1991 | 14.8 |
| 1990 | 14.2616 |
| 1989 | 13.0486 |
| 1988 | 11.735 |
| 1987 | 8.55469 |
| 1986 | 9.38231 |
| 1985 | 8.17991 |
| 1984 | 9.83558 |
| 1983 | 9.64039 |
| 1982 | 7.95637 |
| 1981 | 8.00811 |
| 1980 | 6.56821 |
| 1979 | 4.11349 |
| 1978 | 2.72717 |
| 1977 | 2.84244 |
| 1976 | 3.05184 |
| 1975 | 2.10964 |
| 1974 | 1.12926 |
| 1973 | 0.59739 |
| 1972 | 0.773135 |
| 1971 | 0.367594 |
| 1970 | 0.275738 |
| 1969 | 0.418628 |
| 1968 | 0.408774 |
| 1967 | 0.295643 |
| 1966 | 0.30025 |
| 1965 | 0.150381 |
| 1964 | 0.116137 |
| 1963 | 0.0873138 |
| 1962 | 0.07073 |
| 1961 | 0.0588782 |
| 1960 | - |