| 年份 | 尼日利亚 |
|---|---|
| 2023 | - |
| 2022 | 79.7404 |
| 2021 | 80.5586 |
| 2020 | 81.3186 |
| 2019 | 82.0311 |
| 2018 | 82.6664 |
| 2017 | 83.2752 |
| 2016 | 83.7969 |
| 2015 | 84.1504 |
| 2014 | 84.3667 |
| 2013 | 84.4501 |
| 2012 | 84.4025 |
| 2011 | 84.2781 |
| 2010 | 84.0963 |
| 2009 | 83.8345 |
| 2008 | 83.4854 |
| 2007 | 83.0985 |
| 2006 | 82.6993 |
| 2005 | 82.2922 |
| 2004 | 81.9366 |
| 2003 | 81.613 |
| 2002 | 81.31 |
| 2001 | 81.1156 |
| 2000 | 81.0694 |
| 1999 | 81.2071 |
| 1998 | 81.5688 |
| 1997 | 82.0681 |
| 1996 | 82.5829 |
| 1995 | 83.1076 |
| 1994 | 83.6927 |
| 1993 | 84.336 |
| 1992 | 84.9602 |
| 1991 | 85.4937 |
| 1990 | 85.9917 |
| 1989 | 86.4425 |
| 1988 | 86.7429 |
| 1987 | 86.8814 |
| 1986 | 86.814 |
| 1985 | 86.5289 |
| 1984 | 86.0871 |
| 1983 | 85.4525 |
| 1982 | 84.7108 |
| 1981 | 83.9988 |
| 1980 | 83.3458 |
| 1979 | 82.7176 |
| 1978 | 82.0258 |
| 1977 | 81.3638 |
| 1976 | 80.7206 |
| 1975 | 80.0512 |
| 1974 | 79.3999 |
| 1973 | 78.7829 |
| 1972 | 78.2141 |
| 1971 | 77.6731 |
| 1970 | 77.2148 |
| 1969 | 76.808 |
| 1968 | 76.3735 |
| 1967 | 75.9417 |
| 1966 | 75.5167 |
| 1965 | 75.1135 |
| 1964 | 74.5447 |
| 1963 | 73.9361 |
| 1962 | 73.6425 |
| 1961 | 73.5969 |
| 1960 | 73.6611 |