| 年份 | 尼日利亚 |
|---|---|
| 2023 | - |
| 2022 | - |
| 2021 | 1.164 |
| 2020 | 0.669197 |
| 2019 | 0.855087 |
| 2018 | 0.968367 |
| 2017 | 0.679652 |
| 2016 | 0.48259 |
| 2015 | 0.606651 |
| 2014 | 0.706958 |
| 2013 | 0.707231 |
| 2012 | 0.944829 |
| 2011 | 0.951371 |
| 2010 | 0.620086 |
| 2009 | 0.522028 |
| 2008 | 0.749814 |
| 2007 | 0.757101 |
| 2006 | 0.732426 |
| 2005 | 0.28775 |
| 2004 | 0.689215 |
| 2003 | 0.778808 |
| 2002 | 0.50199 |
| 2001 | 0.726754 |
| 2000 | 0.564095 |
| 1999 | 0.207622 |
| 1998 | 0.165377 |
| 1997 | 0.222939 |
| 1996 | 0.229377 |
| 1995 | 0.249609 |
| 1994 | 0.284985 |
| 1993 | 0.334654 |
| 1992 | 0.141771 |
| 1991 | 0.142401 |
| 1990 | 0.122507 |
| 1989 | 0.130982 |
| 1988 | 0.0838523 |
| 1987 | 0.0893088 |
| 1986 | 0.0945317 |
| 1985 | 0.0638219 |
| 1984 | 0.054648 |
| 1983 | 0.0441564 |
| 1982 | 0.00819506 |
| 1981 | 0.017621 |
| 1980 | 0.0538458 |
| 1979 | 0.0454401 |
| 1978 | 0.0305895 |
| 1977 | 0.0262406 |
| 1976 | 0.0233359 |
| 1975 | 0.0234722 |
| 1974 | 0.0113767 |
| 1973 | 0.00924858 |
| 1972 | 0.007161 |
| 1971 | 0.00671693 |
| 1970 | 0.00208508 |
| 1969 | - |
| 1968 | - |
| 1967 | - |
| 1966 | - |
| 1965 | - |
| 1964 | - |
| 1963 | - |
| 1962 | - |
| 1961 | - |
| 1960 | - |