| 年份 | 尼日利亚 |
|---|---|
| 2023 | - |
| 2022 | 0.891564 |
| 2021 | 0.894906 |
| 2020 | 0.903459 |
| 2019 | 0.917508 |
| 2018 | 0.932686 |
| 2017 | 0.939756 |
| 2016 | 0.94181 |
| 2015 | 0.941393 |
| 2014 | 0.940319 |
| 2013 | 0.940369 |
| 2012 | 0.941975 |
| 2011 | 0.944364 |
| 2010 | 0.946716 |
| 2009 | 0.948537 |
| 2008 | 0.94972 |
| 2007 | 0.950276 |
| 2006 | 0.950727 |
| 2005 | 0.952071 |
| 2004 | 0.954238 |
| 2003 | 0.956636 |
| 2002 | 0.959361 |
| 2001 | 0.962541 |
| 2000 | 0.965893 |
| 1999 | 0.969677 |
| 1998 | 0.974195 |
| 1997 | 0.978857 |
| 1996 | 0.983113 |
| 1995 | 0.987193 |
| 1994 | 0.99125 |
| 1993 | 0.994559 |
| 1992 | 0.996886 |
| 1991 | 0.998313 |
| 1990 | 0.99849 |
| 1989 | 0.997424 |
| 1988 | 0.99492 |
| 1987 | 0.991839 |
| 1986 | 0.989787 |
| 1985 | 0.989052 |
| 1984 | 0.989393 |
| 1983 | 0.991964 |
| 1982 | 0.996071 |
| 1981 | 0.999873 |
| 1980 | 1.0032 |
| 1979 | 1.00581 |
| 1978 | 1.00653 |
| 1977 | 1.0064 |
| 1976 | 1.00807 |
| 1975 | 1.01403 |
| 1974 | 1.02475 |
| 1973 | 1.03947 |
| 1972 | 1.05684 |
| 1971 | 1.07374 |
| 1970 | 1.08772 |
| 1969 | 1.09824 |
| 1968 | 1.10479 |
| 1967 | 1.10865 |
| 1966 | 1.11109 |
| 1965 | 1.11196 |
| 1964 | 1.11147 |
| 1963 | 1.10925 |
| 1962 | 1.10625 |
| 1961 | 1.10227 |
| 1960 | 1.09752 |